Radio Antennas and Broadcast Components

Radio Antennas and Broadcast Components
Radio Antennas and
Broadcast Components
Engineering Excellence since 1942
Radio Antennas and Broadcast Components
Table of Contents
HD RadioTM* Antennas
HDR Series Interleaved Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Multi-station
HDFMVee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
HDFDM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
HDCBR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
FMVee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CBR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Products contained in this catalog may
be covered by one or more of the following
patents:
6,917,264; 6,887,093; 6,882,224; 6,870,443;
6,867,743; 6,816,040; 6,703,984; 6,703,911;
6,677,916; 6,650,300; 6,650,209; 6,617,940;
6,538,529; 6,373,444; 6,320,555; 5,999,145;
5,861,858; 5,455,548; 5,418,545; 5,401,173;
5,167,510; 4,988,961; 4,951,013; 4,899,165;
4,723,307; 4,654,962; 4,602,227; 7,084,822;
7,081,860; 7,061,441; 7,034,545; 7,012,574;
6,972,731; 6,972,648; 6,961,027; 6,914,579;
6,441,796; 7,102,589;
Additonal patents are pending.
Multi-station Antennas
DCR-Q. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
DCR-S / HDR-S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
DCR-MFE Funky Elbow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
DCR-M / HDR-M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
DCR-MT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
DCR-C / HDR-C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
DCR-H / HDR-H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Broadband Systems for Multiplexing Signals
DCR-S / DCR-M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Full Band Master or Auxiliary FM Antennas
DCR-S / DCR-M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Single Station Antennas
DCR-L. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
DCR-T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
DCV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Panel Antenna
DCPJ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Pattern Study and Optimization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Elevation Patterns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
RFR Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Filters and Combiners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
*HD RadioTM is a trademark of iBiquity Digital Corporation.
Specifications are subject to change without notice.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
2
FM Resources
Leading the broadcast industry since 1942
Dielectric is a world leader in the engineering, design, and manufacture of complete
broadcast systems for TV, FM, HF and MF. Our strength is in the development of
custom solutions that fit our customer’s unique requirements.
Single source of responsibility for your FM system
We manufacture a full complement of products, including a variety of proprietary offerings, from the transmitter output to the tower top including antennas, filter/combiner systems, and switches. Products unique to the Dielectric product line include
digiTLineTM, EHTLineTM, and HDR Series antennas. Our service offerings include
system monitoring, tower mapping, modifications and complete installation
and maintenance services. If needed, we have the resources to respond to your
emergency situation.
Digital Radio
More digital television broadcasters have chosen Dielectric brand products than all
other manufacturers combined. We are applying our expertise in digital television
technology to the unique needs of the FM broadcaster. We continue to develop
innovative solutions for FM broadcasters as they transition to digital.
Whether your needs are for a digital, analog or combined antenna, filter, combiner, or
complete system including installation and monitoring services, Dielectric would like
the opportunity to offer you solutions engineered to meet your specific needs.
All Dielectric FM antenna and filter products are compatible with passing the
HD signal.
Guaranteed quality and reliability
Dielectric is so confident in our products’ performance that we offer the best warranty in the business, covering everything from the transmitter output through the
switches, filters, combiner, transmission line, and antenna.
Unique RF products for better broadcast quality
We offer combiner systems that have better frequency response, lower insertion
loss, and lower group delay variation than that of other manufacturers. For the
broadcaster, this means a clearer signal now and digital capabilities later. Dielectric
also manufactures advanced antennas with variable bay spacing for better control
of elevation and azimuth patterns.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
3
HD Radio
HDR Series Interleaved FM Array1
• Interleaved analog/HD Radio array
for simultaneous transmission of
both signals
• Efficient — no additional analog or
digital system losses requiring
higher TPO
• Ability to interleave within existing
antenna
• High isolation requiring minimal supplemental filtering
• Transmitter operating cost reduced through efficient design
• Consistent azimuth and elevation patterns for both analog and digital
• Separate inputs allow redundancy for emergency operations
• Flexibility in radiator type and feed system design
• Common aperture — only 5'-7' (1.52 - 2.13m) of additional tower
space required
• Designed for -10dB IBOC signals
• Uses 33% less energy than common amplification
When considering cost, efficiency, and coverage concerns as well as
tower space availability, many FM broadcasters will choose to interleave
their digital antenna with either a new or existing analog antenna.
Dielectric HDR Series antenna solutions provide extensive flexibility
while maintaining high isolation between the digital and analog system.
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Two complete circularly polarized antenna arrays are interleaved at half
wavelength intervals on a supporting structure. Each antenna array is
typically comprised of the same number of elements, and is fed by a
separate transmission line connected to the appropriate transmitter. By
interleaving the digital left hand-polarized bays with the analog right
hand polarized bays, coupling between the antenna systems is greatly
reduced. No circulator required!
Since both antennas will have the same tower geometry adjacent to
them, the azimuth and elevation patterns of both systems will be the
same and will meet FCC and predicted pattern requirements.
The HDR Series arrays are very cost effective. The cost of the antenna,
second run of low power transmission line and low power circulator is
substantially less than the system cost of a 10 dB coupler and a
transmitter large enough to compensate for additional system losses.
Also, the associated operating costs are substantially reduced (as much
as 10% for analog and as much as 90% for digital) due to the efficiency
of the HDR Series array.
The HDR Series antenna is available in HDR-H, HDR-C and HDR-M
versions depending on specific requirements.
The Dielectric concept is flexible. Interleaving can be applied to any of
Dielectric's side mounted circularly polarized antenna elements
combined with any mixture of feed designs.
1
Patents: 6,972,731; 6,914,579; 7,102,589
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
4
Multi-station Panel Antennas
HDFMVee
• Full 20 MHz bandwidth
• Antenna isolation >40dB for analog and IBOC
• Power ratings up to 10 class C stations
• Single or dual EIA inputs
• Stainless steel element for excellent
reliability
• Element radome standard
• Designed for -10dB IBOC signals
• Omni-directional free space pattern performance
• Low downward radiation
• Ideal for space combining analog and digital signals
The HDFMVee antenna offers ideal characteristics to FM stations
desiring the advantages of top mounting and combined station
operation. This antenna is designed for digital, analog, or both types of
service. When operating in dual mode (IBOC/analog) this antenna is
designed for space combining with superior antenna isolation.
Multi-station FM operation where two or more stations share the same
antenna has increased in popularity due to the inherent cost savings that
can be realized. Multi-station operation with excellent pattern circularity
can be achieved with the wide bandwidth characteristics the HDFMVee
antenna offers. These characteristics are achieved through the use of
broadband radiating elements in conjunction with high power element
hybrids.
The unique design of the HDFMVee antenna offers precise control of
the elevation pattern, which is critical in mobile receiver reception. Beam
tilt and null fill may be provided by means of standard phase and power
distribution techniques.
The HDFMVee antenna is designed for high power operation enabling
station flexibility in transmission system design. Our conservative power
rating ensures adequate design headroom for long-term reliability. The
Dielectric HDFMVee antenna can be configured with one or two input
ports for analog and digital. This feature allows the top and bottom four
bays of a typical eight bay antenna to be fed by two independent
transmission lines. Should standby operation be necessary,
one half of the eight bay antenna may be used at reduced power.
The Dielectric HDFMVee antenna will meet the specific requirements of
FM broadcasters worldwide. Your Dielectric representative can provide
you with additional information for your review and consideration.
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CALCULATED ELEVATION PATTERN
Measured Relative Field
1
0
0.9
-5
-10
4 Bay
0.8
-15
0.7
-20
-30
-30
-25
-20
-15
-10
-5
0
Relative Field
-25
6 Bay
0.6
0.5
8 Bay
0.4
0.3
V
10 Bay
0.2
12 Bay
0.1
H
FMVee-03FM
0
3
Up
-1
-5
-9
Angle from Horizontal
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
Down
-13
5
Multi-station Panel Antennas
HDFMVee
0
-10
-20
-30
-40
-50
Field measured isolation >30dB without the use of a circulator
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
6
Multi-station Panel Antennas
Electrical Specifications
Antenna Type
# of
bays
Gain Polarization1
Power Gain
dB
Power
Rating kW3
HDFMVee-O3-2FM/6U-1
2
0.90
-0.46
125
HDFMVee-O3-4FM/12U-1
4
1.80
2.56
135
HDFMVee-O3-6FM/18U-1
6
2.70
4.31
185
HDFMVee-O3-8FM/24U-1
8
3.70
5.68
185
HDFMVee-O3-10FM/30U-1
10
4.60
6.63
185
HDFMVee-O3-12FM/36U-1
12
5.60
7.48
250
Notes:
1. RMS gain data is given relative to dipole. Values given are for each polarization and nominal for mid band and include
standard harness configurations. Gain will vary depending on feed system, frequency, null fill and beam tilt.
2. Null fill 10% is standard for 4 bays or greater. Beam tilt .75 degrees assumed. Other values of tilt and fill are
available upon request.
3. Power ratings are nominal @ 40˚C (104˚F) and assume pressurization with dry air or nitrogen to 5 psi minimum.
Power ratings may vary dependent on specific feed system design, and local conditions.
4. Higher power ratings and dual inputs are available on request.
5. Antenna components and feed harnesses are optimized for FM channels of interest.
6. Typical circularity ±1.5dB
Mechanical Specifications
Antenna Type
# of
bays
Weight
lbs (kg)
Windload
lbs (kg)
Projected Area
ft2 (m2)
HDFMVee-O3-2FM/6U-1
2
6,500 (2,958)
4,600 (2,093)
92 (8.5)
HDFMVee-O3-4FM/12U-1
4
12,500 (5,688)
9,200 (4,186)
184 (17.1)
HDFMVee-O3-6FM/18U-1
6
19,000 (8,645)
13,800 (6,279)
276 (25.6)
HDFMVee-O3-8FM/24U-1
8
26,000 (11,830)
18,400 (8,372)
368 (34.2)
HDFMVee-O3-10FM/30U-1
10
— Contact factory —
HDFMVee-O3-12FM/36U-1
12
— Contact factory —
Notes:
1. FMVee antennas must be pressurized with dry air or nitrogen.
2. Loads provided assume 50/33 PSF, no ice.
3. Length includes standard 4 ft. (1.22m) lightning rods.
4. Windloads will vary depending on design wind speed and conditions at installation location.
5. Area calculated expressed in terms of equivalent flats (RS-222-C-standard).
6. Windload force calculated based on 50 pounds per square foot (50psf) on flats (RS-222-C-standard).
7. To convert area to equivalent rounds, multiply area by 1.5.
8. To convert area to Aerodynamic area (CaAa - linear or CaAc - discrete) based on EIA-222-F standard, multiply area
by 1.8.
9. Contact your Dielectric sales manager for information on special cases.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
7
Multi-station Panel Antennas
HDFDM
• Very low aerodynamic area
• Galvanized steel, brass and copper construction for excellent reliability
• Ideal for candelabra applications
• Low downward radiation
• High power ratings
• Near perfect omni-directional pattern performance
• In dual mode, IBOC injected by
high level combining or common
amplification
• 10 MHz bandwidth
• Designed for -10dB IBOC signals
The HDFDM is legendary for its reliability and proven performance. The
HDFDM antenna offers ideal characteristics to FM stations desiring the
advantages of top mounting and combined station operation and is
designed for digital, analog, or both types of service.
The Dielectric HDFDM radiator consists of a patented truncated helix
dipole radiator fed in phase and mounted three around on a structural pole
mast. The vertical stubs on each element cancel the effect of the vertical
pole support structure and help shape the element patterns for a near
perfect omnidirectional azimuth pattern. Each layer of dipoles is specifically
tuned and patterns are optimized in conjunction with the supporting pole.
The HDFDM dipole element is supported off a mounting pole, which also
serves as a mounting for the balun assembly. This results in an
aerodynamic design that significantly reduces weight and windload
requirements of the supporting structure. This often represents substantial
savings in support structure cost compared with panel style designs. The
HDFDM also has very low radar cross-sectional area, which makes it the
antenna of choice for candelabra installations because it has a minimal
effect on other antennas mounted on adjacent corners of the tower at the
same height.
Multi-station FM operation where two or more stations share the same
antenna has increased in popularity due to the inherent cost savings that
can be realized. Multi-station operation with excellent pattern circularity can
be achieved with the wide bandwidth characteristics the HDFDM antenna
offers. These characteristics are achieved through the use of broadband
radiating elements. The HDFDM is recommended for applications of up to
10 MHz in bandwidth. For greater bandwith requirements refer to Dielectric's
HDFMVee and HDCBR antennas or consult Dielectric with your specific
needs.
For omnidirectional operation, the shape of the HDFDM’s azimuth pattern
will vary from omni by as little as +/-1.5 dB for top mount configurations
putting it a step ahead of panel type antennas. The unique design of the
HDFDM antenna offers precise control of the elevation pattern, which is
critical in mobile receiver reception. Beam tilt and null fill may be provided
by means of standard phase and power distribution techniques. Consult
Dielectric for specific applications.
The HDFDM antenna is designed for high power operation enabling
station flexibility in transmission system design. Our conservative power
rating ensures adequate design headroom for long-term reliability. The
Dielectric HDFDM antenna can be configured with one or two input ports.
This feature allows the top and bottom portions of a typical five or seven
bay antenna to be fed by two independent transmission lines. Should
standby operation be necessary, one half of the antenna may be used at
reduced power.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
8
Multi-station Panel Antennas
HDFDM
1.2
1.18
1.16
VSWR
1.14
1.12
1.1
1.08
1.06
1.04
1.02
1
94
96
98
100
FREQUENCY (MHz)
102
104
Electrical Specifications
Antenna Type
Gain Polarization spacing1
Power Gain*
dB
Power
Rating kW3
HDFDM-5A
2.20
3.42
70
HDFDM-7A
3.00
4.77
70
Notes:
Please contact an Dielectric representative for high power ratings.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
9
Multi-station Panel Antennas
HDFDM
FM panel antennas are generally utilized in a number of specific situations:
• To achieve better azimuth patterns on larger towers than typical side-mounted element arrays can provide.
• High power and/or very directional applications
• Multi-station or shared facilities.
All antennas are designed specific to the particular needs of the station(s) and to tower limitations. Dielectric will assist
the station or consultant in choosing the proper design and configuration to achieve project goals.
All panel antennas contain elements that are DC grounded for lightning protection.
Mechanical Specifications
Antenna Type
# of
bays
Weight
lbs (kg)
Windload
lbs (kg)
Projected Area
ft2 (m2)
HDFDM-5A
5
6,200 (2,812)
3,000 (1,360)
60 (5.57)
HDFDM-7A
7
11,400 (5,171)
4,150 (1,882)
83 (7.71)
Notes:
1. RMS gain data is given relative to dipole. Values given are for each polarization and nominal for mid band and include
standard harness configurations. Gain will vary depending on feed system, frequency, null fill and beam tilt.
2. Null fill is standard for 5 bays or greater.
3. Power ratings are nominal @40˚C (104˚F) ambient and assume pressurization with dry air or nitrogen to 5 psi minimum. Power ratings may vary dependent on specific feed system design, and local conditions.
4. Higher power ratings and dual inputs are available on request.
5. Antenna components and feed harnesses are optimized for FM channels of interest.
6. Area calculated expressed in terms of equivalent flats (RS-222-C-standard).
7. Windload force calculated based on 50 pounds per square foot (50psf) on flats (RS-222-C-standard).
8. To convert area to equivalent rounds, multiply area by 1.5.
9. To convert area to Aerodynamic area (CaAa - linear or CaAc - discrete) based on EIA-222-F standard, multiply area
by 1.8.
* Other gain values are available. Please contact factory.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
10
Multi-station Panel Antennas
HDCBR
• Ideal for multi-station operation
• Minimal windloading
• Full 20 MHz bandwidth
• Superb azimuth circularity and elevation pattern control to ensure uniform coverage
• High power handling
• Very low VSWR
• Single or dual EIA inputs
• Designed for -10dB IBOC signals
• Custom azimuth patterns available
• Superior antenna isolation
• Ideal for space combining analog and IBOC signals
The HDCBR (Cavity Backed Radiator) antenna. It offers ideal characteristics
to FM stations desiring the advantages of combined station operation or to
stations requiring special directional coverage. The antenna is designed for
digital, analog, or both types of service.
The Dielectric HDCBR consists of a crossed dipole radiator fed in phase
quadrature and mounted within a square cavity. Rotating RF energy is
produced when the cavity is excited by the dipole elements. Cavity size is
principally determined by beamwidth requirements. A beamwidth of 90
degrees is required for a 4-around array and 120 degrees is required for a
3-around array (measured at the half-voltage coordinates).
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Grid Cavity
The cavity used in the Dielectric circularly polarized FM antenna is a welded
steel galvanized grid. The cavity grid is supported from a center mounting
plate, which also serves as a mounting for the dipole assembly and for
attachment of the unit to the supporting structure. The use of grid cavities
and aerodynamic design significantly reduces weight and windload
requirements of the supporting structure. This often represents substantial
savings in support structure cost compared with other panel style antenna
designs.
For omnidirectional operation, the shape of the standard azimuth pattern will
vary from omni by less than ±2.0 dB for optimized tower configurations.
Stations employing directional arrays will find one of the several patterns
available to be ideally suited to their specific needs.
The Dielectric HDCBR antenna is designed for high power operation
enabling station flexibility in transmission system design. Our conservative
power rating ensures adequate design headroom for long term reliability. The
Dielectric HDCBR antenna can be configured with one or two input ports.
This feature allows the top and bottom portions of a typical antenna to be fed
by two independent transmission lines. Should standby operation be
necessary, one half of the system may be used at reduced power.
Multi-station Operation
Multi-station FM operation where two or more stations share the same
antenna has increased in popularity due to the inherent cost savings which
can be realized. Multi-station operation can be achieved only with the wide
bandwidth characteristics the Dielectric CBR antenna offers.
These characteristics are achieved through the use of a broadband radiating
element in conjunction with high power hybrid junctions.
Dielectric also offers the associated combining equipment necessary for
multi-station operation. Dielectric's experience with multiplexer installations
ensures proper combiner operation to optimize the system operation.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
11
Multi-station Panel Antennas
HDCBR
Azimuth Circularity
For omnidirectional operation, the shape of the standard azimuth pattern will vary from omni by less than ±2.0 dB for
three-sided tower configurations. With a four-around antenna array, the typical circularity will be comparable.
Stations employing directional arrays will find one of the several patterns available to be ideally suited to their specific
needs.
High Power Capabilities
The Dielectric CBR antenna is designed for high power operation enabling station flexibility in transmission system
design. Our conservative power rating ensures adequate design headroom for long term reliability.
The Dielectric CBR antenna can be configured with one or two input ports. This feature allows the top and bottom six
bays of a typical twelve bay antenna to be fed by two independent transmission lines. Should standby operation be
necessary, one half of the system may be used at reduced power.
1.10
1.09
1.08
1.07
VSWR
1.06
1.05
1.04
1.03
1.02
1.01
1
88
90
92
94
96
98
100
FREQUENCY
102
104
108
Left Hand CP
VSWR
VSWR
Right Hand CP
106
FREQUENCY
FREQUENCY
Typical VSWR responses including 1100' of transmission line
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
12
Multi-station Panel Antennas
FMVee
• Full 20 MHz bandwidth
• ABS feed point radome standard
• Power ratings up to 10 class C stations
• Low downward radiation
• Stainless steel element for excellent
reliability
• Near omni-directional pattern performance
• Designed for -10dB IBOC signals
• Low windload, flanged, top mount design
• Single or dual EIA inputs
• Lightning resistant – grounded radiating elements
• RH circular polarization standard
• Ideal for commom amplification or high level combining
The FMVee (arrowhead dipole) antenna offers ideal characteristics to FM
stations desiring the advantages of top mounting and combined station
operation.
The Dielectric FMVee radiator consists of a crossed dipole radiator fed in
phase quadrature and mounted three around on a structural pipe mast.
Rotating RF energy is produced when the element is fed in phase
quadrature by an integral element hybrid divider. The wings between each
element shape the element patterns and also help isolate adjacent
elements.
The element used in the Dielectric FMVee circularly polarized antenna is a
welded stainless steel grid. The element is supported off a mounting pole,
which also serves as a mounting for the balun assembly. The aerodynamic
elements and screens significantly reduce weight and windload
requirements of the supporting structure. This often represents substantial
savings in support structure cost compared with panel style designs.
Multi-station FM operation where two or more stations share the same
antenna has increased in popularity due to the inherent cost savings that
can be realized. Multi-station operation with excellent pattern circularity can
be achieved with the wide bandwidth characteristics the FMVee antenna
offers. These characteristics are achieved through the use of broadband
radiating elements in conjunction with high power element hybrids.
Dielectric also offers the associated combining equipment necessary for
multi-station operation. Dielectric's experience with multiplexer
installations ensures proper combiner operation to optimize the system
performance.
For omnidirectional operation, the shape of the standard azimuth pattern
will vary from omni by less than +/-2 dB for top mount configurations.
The unique design of the FMVee antenna offers precise control of the
elevation pattern, which is critical in auto receiver reception. Vertical
pattern contouring to introduce beam tilt and null fill may be provided by
means of standard phase and power distribution techniques.
The FMVee antenna is designed for high power operation enabling
station flexibility in transmission system design. Our conservative power
rating ensures adequate design headroom for long-term reliability. The
Dielectric FMVee antenna can be configured with one or two input ports.
This feature allows the top and bottom four bays of a typical eight bay
antenna to be fed by two independent transmission lines. Should standby
operation be necessary, one half of the eight-bay antenna may be used
at reduced power.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
13
Multi-station Panel Antennas
FMVee
The Dielectric antenna test range is one of the few facilities in existence capable of complete antenna testing. The test
range transmit and receive transmitters sit on the crest of two hills behind the Dielectric factory. This unique geographical
setting offers ideal conditions for testing approaching the “free space” situation of an installed antenna. Here the
computer generated azimuth and elevation patterns of a Dielectric antenna can be proven out with highly accurate and
sophisticated test equipment – translating the theory of calculated patterns into the reality of actual antenna
performance.
The Dielectric FMVee antenna will meet the exacting requirements of FM broadcasters. Your Dielectric representative
can provide you with additional information for your review and consideration.
Electrical Specifications
Model
# of bays
RMS Gain
Ea. Pol.
(ratio)
RMS Gain
Input
Ea. Pol.
(ratio)
Max. Avg.
Power
(kW)
Max. Peak
Windload
(kW)
Rad. Center
Above Tower Top
(ft) (m)
FMVee-O3-2FM/6U-1
2
.90
-.46
6-50 125
2700
8.83 (2.65)
FMVee-O3-4FM/12U-1
4
1.8
2.56
6-50 135
3300
17.50 (5.25)
FMVee -O3-6FM/18U-1
6
2.7
4.31
6-50 EHT 185
3900
26.16 (7.84)
FMVee O3-8FM/24U-1
8
3.7
5.68
6-50 EHT
185
3900
34.83 (10.45)
FMVee -O3-10FM/30U-1
10
4.6
6.63
6-50 EHT 185
3900
43.50 (13.05)
FMVee -O3-12FM/36U-1
12
5.6
7.48
6-50 EHT Dual
250
6000
52.16 (15.64)
Notes:
1. RMS gain data is given relative to dipole. Values given are for each polarization, nominal for mid band and include standard harness configurations. Gain will vary depending on feed system, frequency, null fill and beam tilt.
2. Null fill 10% is standard for 4 bays or greater. Beam tilt .75 degrees assumed. Other values of tilt and fill are available
upon request.
3. Power ratings are nominal @ 40˚C (104˚F) and assume pressurization with dry air or nitrogen to 5 psi minimum. Power
ratings may vary dependent on specific feed system design, and local conditions.
4. Higher power ratings and dual inputs are available on request.
5. Antenna components and feed harnesses are optimized for FM channels of interest.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
14
Multi-station Panel Antennas
FMVee
Mechanical Specifications
Model
Length ft (m)
CfAc
ft2
Ma
ft (m)
Weight
lbs (kg)
FMVee-O3-2FM/6U-1 21.66 92 8.836,500
(6.49)
(2.65)(2,925)
FMVee-O3-4FM/12U-1 39.00 184 17.5012,500
(11.70)
(5.25)(5,625)
FMVee -O3-6FM/18U-1
56.33
276
26.16
19,000
(16.90)
(7.85)(8,550)
FMVee O3-8FM/24U-1
73.66
368
34.83
26,000
(22.09)
(10.45)(11,700)
Notes:
1. FMVee antennas must be pressurized with dry air or
nitrogen.
2. Loads provided assume TIA/EIA-222-F, 80 mph basic
wind speed, 1,200 ft (360m) tower, 42.6 psf. No ice.
3. Length includes standard 4 ft (1.2m) lightning rods.
4. Windloads will vary depending on design wind speed &
conditions at installation location.
5. Contact your Dielectric sales manager for information
on special cases.
FMVee -O3-10FM/30U-1Contact factory
FMVee -O3-12FM/36U-1Contact factory
CALCULATED ELEVATION PATTERN
1
0
0.9
-5
-10
4 Bay
0.8
-15
0.7
-20
-30
-30 -25 -20 -15
-10
-5
0
Relative Field
-25
6 Bay
0.6
0.5
8 Bay
0.4
0.3
10 Bay
0.2
12 Bay
0.1
0
3
Up
-1
-5
-9
Angle from Horizontal
Down
VSWR vs. Frequency
VSWR
1.2
1.15
1.1
1.05
1
88 93 98 103108
Frequency (MHz)
Analog Input
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
15
-13
Multi-station Panel Antennas
CBR
• Ideal for multi-station operation
• Designed for common amplification
or high level combining
• High power handling
• Very low VSWR
• Minimal windloading
• Superb horizontal circularity and vertical pattern control to ensure
uniform coverage
• Available in one, two, three or four around configurations
• Full assembly and testing available at our full capability antenna test
range to ensure top performance.
• Designed for -10dB IBOC signals
The CBR (Cavity Backed Radiator) antenna offers ideal characteristics to FM
stations desiring the advantages of combined station operation or to stations
requiring special directional coverage.
The Dielectric Cavity Backed Radiator consists of a crossed dipole radiator fed
in phase quadrature and mounted within a circular cavity. Rotating RF energy
is produced when the cavity is excited by the dipole elements. The signal
emanating from the cavity is right-hand circular. The field rotates clockWise as
viewed in the direction of propagation. Cavity size is principally determined by
beamwidth requirements. A beamwidth of 90 degrees is required for a
4-around array and 120 degrees is required for a 3-around array (measured at
the half-voltage coordinates). When operating in dual mode (IBOC/analog)
this antenna is designed for common amplification or high level combining.
Grid Cavity
The cavity used in the Dielectric circularly polarized FM antenna is a welded
steel galvanized grid. The cavity grid is supported from a center mounting
plate, which also serves as a mounting for the dipole assembly and for
attachment of the unit to the supporting structure. The use of grid cavities
and aerodynamic design significantly reduces weight and windload
requirements of the supporting structure. This often represents substantial
savings in support structure cost compared with other panel style antenna
designs.
B
>40d N
ATIO
L
O
S
I
Multi-station Operation
Multi-station FM operation where two or more stations share the same
antenna has increased in popularity due to the inherent cost savings which
can be realized. Multi-station operation can be achieved only with the wide
bandwidth characteristics the Dielectric CBR antenna offers.
These characteristics are achieved through the use of a broadband radiating
element in conjunction with high power hybrid junctions.
Dielectric also offers the associated combining equipment necessary for
multi-station operation. Dielectric's experience with multiplexer installations
ensures proper combiner operation to optimize the system operation.
Azimuth Circularity
For omnidirectional operation, the shape of the standard azimuth pattern will
vary from omni by less than ±2.0 dB for three-sided tower configurations.
With a four-around antenna array, the typical circularity will be comparable.
Stations employing directional arrays will find one of the several patterns
available to be ideally suited to their specific needs.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
16
Multi-station Panel Antennas
CBR
Elevation Pattern
The unique design of the CBR antenna offers precise control of the elevation pattern which is critical in auto receiver
reception. Vertical pattern contouring to introduce beam tilt and null fill may be provided by means of standard phase and
power distribution techniques.
High Power Capabilities
The Dielectric CBR antenna is designed for high power operation enabling station flexibility in transmission system design.
Our conservative power rating ensures adequate design headroom for long term reliability.
The Dielectric CBR antenna can be configured with one or two input ports. This feature allows the top and bottom six bays
of a typical twelve bay antenna to be fed by two independent transmission lines. Should standby operation be necessary,
one half of the system may be used at reduced power.
Full Range Testing
The Dielectric antenna test range is one of the few facilities in existence capable of complete antenna testing. Two test
transmitters are located adjacent to the range. This unique geographical setting offers ideal conditions for testing
approaching the “free space” situation of an installed antenna.
Here the computer plotted azimuth and elevation patterns of a Dielectric antenna can be proven out with highly accurate
and sophisticated test equipment – translating the theory of calculated patterns into the reality of actual antenna
performance.
Meeting Precise Requirements
The Dielectric CBR antenna can meet the exacting requirements of FM broadcasters. Your Dielectric representative can
provide you with additional information for your review and consideration.
Measured VSWR Characteristics of Multiplexed CBR at antenna input port
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
17
Multi-station DCR Antennas
DCR-Q
• 16 MHz bandwidth
• Circularly polarized
• Single bay power rating of 35kW
• Brass construction
• Array input power up to 200 kW
• Low ice sensitivity
• Variable bay spacing
• Low weight and windload
• Branch feed for multi-station operation
• Designed for -10dB IBOC signals
The DCR-Q was born out of a request to develop a side-mount antenna to
support 9 FM stations. Its quadrapole design is an evolution of the popular
Dielectric DCR-M antenna. The DCR-Q meets the need of high power
broadcasters desiring the azimuth pattern performance of a side-mounted
antenna along with the broadband performance and high power handling of a
panel. This highly engineered antenna has been specifically developed for
multichannel combined applications. We recommend that you consult
Dielectric when considering this antenna. Pattern studies are recommended to
take full advantage of the azimuth pattern offered by this antenna design.
Multi-Station Operation
The wideband characteristics and high power capacity of the DCR-Q make
this antenna an ideal alternative to panel antennas. A variety of custom
options are available.
General Specifications:
Pattern Circularity in Free Space:
Element Diameter:
± 1 dB
45" (114.3cm)
Construction
The Dielectric DCR-Q element is designed with rugged heavy wall brass
tubing. The power dividers and bay feeders are copper and brass construction
all designed for long life and reliability. The DCR-Q is a side firing helix design
consisting of four dipole elements providing true circular polarization.
Ice stability
Due to the broadband nature of the DCR-Q element, it is inherently stable.
Deicers are recommended for applications where heavy icing conditions are
anticipated.
Weight and windload
The relative low weight and windload of this antenna makes it ideal for towers
that could not otherwise support a master FM panel antenna or for applications
where the cost of reinforcing a tower is prohibitive.
Low RF cross section
The low profile of the antenna also makes it an ideal candidate for candelabra
applications. When mounted on a small support structure, it has minimal impact
on other antennas at the same height.
Beam tilt and null fill
Beam tilt and/or null fill are normally included in arrays of eight bays or more,
however, they may also be utilized on smaller arrays. Contact Dielectric and we’ll
design an antenna to meet your specific needs.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
18
Multi-station DCR Antennas
DCR-Q
Electrical Specifications
Antenna Type
# of
bays
Gain Polarization Power Gain
dB
Power Rating
kW3
DCR-Q1
1
0.43
-3.67
35
DCR-Q2
2
0.93
-0.32
70
DCR-Q4
4
1.79
2.53
140
DCR-Q6
6
2.50
3.98
200
DCR-Q8
8
3.30
5.18
200
DCR-Q10
10
4.20
6.23
200
DCR-Q12 12
5.00
6.99
200
Notes:
1. RMS gain data is given relative to dipole. Values are for each polarization and nominal for midband and include standard harness configurations. Actual gain will vary depending on feed system, frequency, null fill and bean tilt.
2. Average power ratings are nominal @ 40°C ambient. Assumes constant pressurization with dry air or nitrogen. Ratings
may vary based on specific feed system design and local conditions.
3. Higher power ratings and custom feed systems may be available on request.
4. Antenna components and feed harnesses are optimized for FM channels of interest.
Mechanical Specifications
Antenna Type
# of
bays
Weight
lbs (kg)
Windload
lbs (kg)
Projected Area
ft2 (m2)
DCR-Q1
1
220 (100)
226 (103)
4.5 (0.4)
DCR-Q2
2
440 (200)
452 (205)
9.0 (0.8)
DCR-Q4
4
880 (400)
903 (411)
18.1 (1.7)
DCR-Q6
6
1,320 (601)
1,355 (617)
27.1 (2.5)
DCR-Q8
8
1,760 (801)
1,808 (823)
36.2 (3.4)
DCR-Q10
10
2,200 (1,001)
2,260 (1,028)
45.2 (4.2)
DCR-Q12 12
2,640 (1,201)
2,710 (1,233)
54.2 (5.0)
Notes:
1. Weights include bays and standard extension brackets for mounting. Excludes feed system and custom mounts. For
antennas that included pattern studies, contact factory for additional information.
2. Projected area includes bays and standard extension brackets. Excludes feed system and custom mounts.
3. Ice shields are strongly recommended for areas subject to tower icing. Dielectric is not responsible for antenna
damage caused by impact from falling ice.
4. Area calculated expressed in terms of equivalent flats (RS-222-C-standard).
5. Windload force calculated based on 50 pounds per square foot (50psf) on flats (RS-222-C-standard).
6. To convert area to equivalent rounds, multiply area by 1.5.
7. To convert area to Aerodynamic area (CaAa - linear or CaAc - discrete) based on EIA-222-F standard, multiply area
by 1.8.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
19
Multi-station DCR Antennas
DCR-S / HDR-S
• DCR-M: Right Hand Circularly Polarized
• 28 kW for a single bay
• HDR-M: Left Hand Circularly Polarized
• Fine matcher included
• DCR-M/HDR-M IBOC compatible
• Radomes or integral deicers optional
• Interleaved provides -40dB of isolation
• VSWR field adjustable
• Stainless steel elements
• High power bays for multiplexing high power signals
• Ideal for Class B and C stations
• High peak power ratings
The DCR-S/HDR-S has been used extensively for high power broadband
applications. The “S” series antennas are circularly polarized with a power
rating of 28 kW for a single bay and is available in stacked arrays of up to 16
bays with an input rating to 120 kW. For situations where ice formation is
common, the arrays can be equipped with optional electrical deicers or
radomes. The antenna is DC grounded and does not require shorting stubs.
Each array is supplied with an input fine matcher for field optimization. For
reduced down-ward radiation, the use of a custom feed design allows for
shorter spacings in a series fed configuration.
High Power Input Capability
General Specifications
The DCR-S and HDR-S were designed to handle high input power ideally
suited for multiplexing. The “S” series antenna is available with optional
4-1/16“ feed system having a power input rating (for five or more bays) of
70 kW. Arrays with 6-1/8” inputs are also available.
Polarization:Circular
Multi-Station Operation
Pattern Circularity in
Free Space: VSWR (max.) at Input,
w/o field trim:
Top Mounted
Side Mounted
± 1 dB
1.2:1
1.5:1
VSWR (max.) at Input, w/field trim,
Top or Side Mounted
(+/-200 KHz):
1.05:1
(+/-400 KHz):
1.10:1
Input: 3-1/8" EIA
The wide bandwith and the high power input capability of the “S” series
antenna permits optional multi-station operation.
Beam Tilt and Null Fill
Beam tilt and/or null fill are available options. These options are ordinarily
specified for arrays of 8 bays or more. Even numbered arrays of six sections
and fewer may include one or both options and typically are designed as a
center-fed array. The “S” series antenna is available in directional arrays which
are custom-built to the needs of the station.
Quadrapole Design
Bay Dimensions (without Radome):
Diameter
36" (915mm)
Height 29" (737mm)
The four-dipole-per-element design offers the advantage of more symmetrical
azimuth pattern performance and H/V ratio than dual dipole designs,
providing more rubust coverage.
Bay Dimensions (with Radome):
Diameter
44" (1118mm)
Height 34" (864mm)
Low downward radiation options available — contact factory.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
20
Multi-station DCR Antennas
DCR-S / HDR-S
Mounting Dimensions
Ha = Antenna aperture length
Hc = Antenna center of radiation
Ho = Antenna overall length needed for mounting
Ha = 984/f x [s(x-1)]
Hc = Ha/2
Ho end-fed = Ha + 5’top + 10’ - 5”bottom
Ho center-fed = Ha + 5’top + 5’bottom
Ha
Ha
Ho
Hc
Hc
All dimensions in feet
f = frequency in megahertz (MHz)
s = bay spacing in fraction of wavelengths
example: ½ wavelength = .5
x = number of antenna bays
Ho
Note: Antennas ordered w/beam tilt and/or null
fill are supplied with center feed and require and even
number of bays
11’-0”
Deicer Specifications:
Power (nominal per bay): 1200 W
Voltage: may be wired for 208 V or
240 V service, single or three phase.
10’-5”
Pole
Mounting
Side
Mounting
End-Fed
1-7 Sections
Center-Fed
Optional: Ice sensor and deicer controller
Mechanical Specifications
Antenna # of Without Radomes With Radomes
With Deicers
Type
Bays
Weight lbs (kg)
CaAc ft2 (m3)
Weight lbs (kg)
CaAc ft2 (m3)
Weight lbs (kg)
CaAc ft2 (m3)
1/ λ
1/ λ
1/ λ
1/ λ
1/ λ
1/ λ
DCR-S or
λ
λ
λ
λ
λ
λ
2
2
2
2
2
2
HDR-S
Spaced SpacedSpacedSpacedSpaced Spaced SpacedSpacedSpacedSpacedSpacedSpaced
DCR-S1
HDR-S1
DCR-S2
HDR-S2
DCR-S3
HDR-S3
DCR-S4
HDR-S4
DCR-S5
HDR-S5
DCR-S6
HDR-S6
DCR-S7
HDR-S7
DCR-S8
HDR-S8
DCR-S10
HDR-S10
DCR-S12
HDR-S12
1
198 (90)
2
7.2 (.7)
335(152)
11.2 (1.0)
322 (146) 307 (139) 14.1 (1.3) 12.6 (1.2)
607 (275)
592 (269) 22.1 (2.1)
20.6 (1.9) 332 (151) 317 (144) 15.1 (1.4) 13.6 (1.3)
3
451 (205) 421 (191)
879 (394)
849 (385) 33.0 (3.1)
30.0 (2.8) 466 (211) 436 (198) 22.5 (2.1) 19.5 (1.8)
4
581 (264) 536 (243) 27.9 (2.6) 23.4 (2.2) 1151 (522) 1106 (502) 43.9 (4.1)
39.4 (3.7) 601 (273) 556 (252) 29.9 (2.8) 25.4 (2.4)
5
710 (322) 650 (295) 34.8 (3.2) 28.8 (2.7) 1423 (645) 1363 (618) 54.9 (5.1)
48.9 (4.5) 735 (333) 675 (306) 37.3 (3.5) 31.3 (2.9)
6
840 (381) 765 (347) 41.7 (3.9) 34.2 (3.2) 1695 (769) 1620 (733) 65.8 (6.1)
58.3 (5.4) 870 (395) 795 (361) 44.7 (4.2) 37.2 (3.5)
7
969 (440) 879 (399) 48.5 (4.5) 39.5 (3.7) 1967 (892) 1877 (851) 76.6 (7.1)
67.6 (6.3) 1004 (455) 914 (415)
8
1142 (518) 1037(470) 55.7 (5.2) 45.2 (4.2) 2239 (1016) 2134 (968) 87.8 (8.2)
77.3 (7.2) 1182 (536) 1033 (468) 59.7 (5.5) 49.2 (4.6)
21 (2.0)
18 (1.7)
197 (89)
7.7 (.7)
52 (4.8)
43 (4.0)
10 1401 (635) 1266 (574) 69.5 (6.5) 56 (5.2) 2753 (1249) 2618 (1188) 110.0 (10.2) 96.5 (9.0) 1451 (658) 1286 (583) 74.5 (6.9) 61 (5.7)
12 1660 (753) 1495 (678) 83.3 (7.7) 66.8 (6.2) 3267 (1481) 3102 (1407) 131.0 (12.2) 115.0 (10.6) 1720 (780) 1555 (705) 89.3 (8.3) 72.8 (6.8)
Notes:
1. CaAc and weight includes bays and standard extension brackets for mounting. Excludes custom mounts.
For antennas that include pattern studies, contact factory for additional information.
2. Dimensions are for antennas at 98.0 MHz and can vary ± 10% across the band.
3. Ice shields are strongly recommended for areas subject to icing conditions. Dielectric is not responsible for antenna damage caused by
impact from falling ice.
4. Calculated area (CaAc) expressed in TIA/EIA-222-F standard.
5. Specs. are for a single DCR-S antenna array or HDR-S antenna array, not both.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
21
Multi-station DCR Antennas
DCR-S / HDR-S
Electrical Specifications
Antenna Type
DCR-S or HDR-S
DCR-S1
HDR-S1
DCR-S2
HDR-S2
DCR-S3
HDR-S3
DCR-S4
HDR-S4
DCR-S5
HDR-S5
DCR-S6
HDR-S6
DCR-S7
HDR-S7
DCR-S8
HDR-S8
DCR-S10
HDR-S10
DCR-S12
HDR-S12
Gain Polarization spacing1
1/ λ Spacing
λ Spacing
2
Power Gain
dB
Power Gain
dB
Power
Rating kW3
0.46
-3.37
28
1.0
0
0.7
-1.55
40
1.5
1.76
1.0
0
40
2.1
3.22
1.3
1.14
40
2.7
4.31
1.6
1.76
40
3.2
5.05
1.8
2.55
40
3.8
5.80
2.1
3.22
40
4.3
6.34
2.3
3.62
40
5.5
7.40
2.9
4.62
40
6.6
8.2
3.5
5.44
40
Notes:
1. RMS gain data is given relative to dipole. Values are for midband and include standard harness configurations.
Actual gain will vary depending on feed system, frequency, null fill, and beam tilt.
2. Average power ratings are nominal @ 40˚C (104˚F) ambient. Assumes constant pressurization with dry air or
nitrogen. Ratings may vary based on specific feed system design and local conditions.
3. Higher power ratings and custom feed systems may be available on request.
4. Antenna components and feed harnesses are optimized for FM channels of interest
5. Specifications. are for a single DCR-S antenna array or HDR-S antenna array, not both.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
22
Multi-station DCR Antennas
DCR-MFE "Funky Elbow"
• Variable spacing
• Low ice sensitivity
• Broad bandwidth capability
• Fine matcher included
• Array input power 100kW or more
• Match bay spacing to existing tower for more consistent
pattern results
• Series fed for multi-station operation
• Circularly polarized
• Radomes/deicers available
• Stainless steel construction
The DCR-MFE antenna is center fed, meeting the needs of high power, high
bandwidth and short spaced bay requirements.
Variable Bay Spacing
Through the use of a series feed system, proper RF phase to each bay is
maintained, even at reduced bay spacings. This allows for bay spacings
between 1/2 and full wavelength. The reduction in bay spacing can have
multiple benefits including: 1) A significant reduction in the amount of
"downward" radiation. 2) Broader elevation beam. 3) More constant patterns.
It must be noted that reducing the bay spacing for a given number of bays
also reduces the gain. An 8 bay with full wavelength spacing has a gain of
4.3x. The elevation pattern of an 8 bay half wavelength with a gain of 2.4x
resembles the elevation pattern of a 4 bay full wavelength in terms of beam
width and gain. A variety of bay spacing is available; contact factory for details.
High Power Input Capability
The DCR-M is designed with input line sizes up to 6-1/8" EIA. This allows for
array input power levels in excess of 100kW.
Beam Tilt and Null Fill
Beam tilt and/or null fill are options typically offered in arrays of eight bays or
more, however they may also be utilized on smaller arrays.
Directional Arrays
The DCR-MFE antenna is available in directional arrays which are custombuilt to the needs of the specific station.
Multi-Station Operation
General Specifications
Pattern Circularity in
Free Space:
± 1 dB
VSWR (max.) at Input,
Up to 8 MHz:
1.15:1 typical,
call for quote on
specific application
The high power handling and wideband characteristics of the DCR-MFE make
this antenna an excellent alternative to high cost panel antennas.
To aid in selecting the elevation pattern most suitable to your application,
please visit our website and download Dielectric's Antenna Planning software.
Input:
3-1/8" 50 ohm
Standard, larger sizes
available
Section Dimensions:
Diameter
36" (915mm)
Height
29" (737mm)
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
23
Multi-station DCR Antennas
DCR-MFE "Funky Elbow"
Deicer Specifications:
Power (nominal, per bay):
1200 W
Voltage: May be wired for
208V or 240V service,
single- or three-phase
Electrical Specifications
Antenna
Type
Optional:
Ice sensor and deicer
controller.
Gain Polarization spacing1
7/ λ Spacing
/4 λ Spacing
8
Power Gain
dB
Power Gain
dB
3
Power
Rating kW3
DCR-MFE4
1.80
2.55
2.1
3.22
40
DCR-MFE6
2.70
4.31
3.1
4.91
40
DCR-MFE8
3.60
5.56
4.1
6.12
40
DCR-MFE10
4.50
6.53
5.1
7.08
40
DCR-MFE12
5.40
7.32
6.1
7.85
40
Notes:
1. RMS gain data is given relative to dipole. Values are for each polarizatiion and nominal
for midband and include standard harness configurations. Actual gain will vary
depending on feed system, frequency, null fill, and beam tilt.
2. Average power ratings are nominal @ 40˚C ambient. Assumes constant pressurization
with dry air or nitrogen. Ratings may vary based on specific feed system design and
local conditions.
3. Higher power ratings and custom feed systems may be available on request.
4. Antenna components and feed harnesses are optimized for FM channels of interest.
Mechanical Specifications
Antenna
# of Without Radomes With Radomes
With Deicers
Type
Bays Weight lbs (kg)
CaAc ft2 (m2)
Weight lbs (kg)
CaAc ft2 (m2)
Weight lbs (kg)
CaAc ft2 (m2)
3/ λ
7/ λ
3/ λ
7/ λ
3/ λ
7/ λ
3/ λ
7/ λ
3/ λ
7/ λ
3/ λ
7/ λ
DCR-M or
4
8
4
8
4
8
4
8
4
8
4
8
HDR-M
SpacedSpaced SpacedSpaced Spaced Spaced Spaced Spaced SpacedSpacedSpacedSpaced
DCR-M2
HDR-M2
DCR-M3
HDR-M3
DCR-M4
HDR-M4
DCR-M5
HDR-M5
DCR-M6
HDR-M6
DCR-M7
HDR-M7
DCR-M8
HDR-M8
DCR-M10
HDR-M10
DCR-M12
HDR-M12
2
277 (126) 280 (127) 12.1 (1.1) 12.5 (1.2)
562 (255)
565 (257)
21.3 (2.0)
21.7 (2.0)
287 (130) 290 (132) 13.1 (1.2) 13.5 (1.3)
3
384 (175)
812 (369)
819 (372)
31.4 (2.9)
32.2 (3.0)
399 (181) 406 (184) 19.1 (1.8) 19.9 (1.9)
4
492 (224) 502 (228) 23.1 (2.1) 24.3 (2.3) 1062 (483) 1072 (487)
41.5 (3.9)
42.7 (4.0)
512 (233) 522 (237) 25.1 (2.3) 26.3 (2.4)
5
600 (273) 613 (279) 28.6 (2.7) 30.2 (2.8)
51.7 (4.8)
53.3 (5.0)
624 (283) 638 (290) 31.1 (2.9) 32.7 (3.0)
6
707 (321) 724 (329) 34.2 (3.2) 36.2 (3.4) 1562 (710)
1579 (718)
61.9 (5.7)
63.9 (5.9)
737 (335) 754 (343) 37.2 (3.5) 39.2 (3.6)
7
814 (370) 835 (380) 39.6 (3.7) 42.0 (3.9) 1812 (823) 1833 (833)
71.9 (6.7)
74.3 (6.9)
849 (386) 870 (395) 43.1 (4.0) 45.5 (4.2)
8
965 (439) 989 (450) 45.4 (4.2) 48.2 (4.5) 2062 (937) 2086 (948)
82.3 (7.6)
85.1 (7.9) 1005 (457) 1029 (468) 49.4 (4.6) 52.2 (4.8)
10
1180 (536) 1211 (550) 56.4 (5.2) 60.0 (5.6) 2532 (1151) 2563 (1165) 102.9 (9.6) 106.5 (9.9) 1230 (559) 1260 (573) 61.4 (5.7) 65.0 (6.0)
391 (178) 17.6 (1.6) 18.4 (1.7)
1412 (642) 1426 (648)
12 1395 (634) 1433 (651) 67.4 (6.3) 71.8 (6.7) 3002 (1364) 3040 (1382) 122.3 (11.4) 126.7 (11.8) 1455 (661) 1493 (679) 73.4 (6.8) 77.8 (7.2)
Notes:
1. Weights include bays and standard extension brackets for mounting. Excludes feed system and custom mounts. For
antennas that included pattern studies, contact factory for additional information.
2. Projected area includes bays and standard extension brackets. Excludes feed system and custom mounts.
3. Dimensions are for antennas at 98.0 MHz and can vary ±10% across the band.
4. Ice shields are strongly recommended for areas subject to tower icing. Dielectric is not responsible for antenna damage
caused by impact from falling ice.
5. Area calculated expressed in terms of equivalent flats (RS-222-C-standard).
6. Windload force calculated based on 50 pounds per square foot (50psf) on flats (RS-222-C-standard).
7. To convert area to equivalent rounds, multiply area by 1.5.
8. To convert area to Aerodynamic area (CaAa - linear or CaAc - discrete) based on EIA-222-F standard, multiply area by 1.8.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
24
Multi-station DCR Antennas
DCR-M / HDR-M
• DCR-M: Right Hand Circularly Polarized
• Ideal for Class B and C stations
• HDR-M: Left Hand Circularly Polarized
• 18 kW for a single bay
• DCR-M/HDR-M IBOC compatible
• Fine matcher included
• Interleaved provides -40dB of isolation
• Radomes or integral deicers optional
• Stainless steel elements
• VSWR field adjustable
The DCR-M/HDR-M has been used extensively for high power broadband
applications. The “M” series antennas are circularly polarized with a power
rating of 18 kW for a single bay and is available in stacked arrays of up to
16 bays with an input rating to 40 kW. For situations where ice formation is
common, the arrays can be equipped with optional electrical deicers or
radomes. The antenna is DC grounded and does not require shorting
stubs. Each array is supplied with an input fine matcher for field
optimization. For reduced down-ward radiation, the use of a custom feed
design allows for shorter spacings in a series fed configuration.
High Power Input Capability
The “M” series antenna is available with optional 4-1/16“ feed system
having a power input rating (for five or more bays) of 70 kW. Arrays w/
6-1/8” inputs are also available.
Multi-Station Operation
The wide bandwith of high power input capability of the “M” series antenna
permits optional multi-station operation.
Beam Tilt and Null Fill
General Specifications
Polarization:Circular
Pattern Circularity in
Free Space: VSWR (max.) at Input,
w/o field trim:
Top Mounted
Side Mounted
± 1 dB
1.2:1
1.5:1
VSWR (max.) at Input, w/field trim,
Top or Side Mounted
(±200 KHz):
1.05:1
(±400 KHz):
1.10:1
Input: Beam tilt and/or null fill are available options. These options are ordinarily
specified for arrays of 8 bays or more. Even numbered arrays of six
sections and fewer may include one or both options and typically are
designed as a center-fed array. The “M” series antenna is available in
directional arrays which are custom-built to the needs of the station.
Quadrapole Design
The four-dipole-per-element design offers the advantage of more
symmetrical azimuth pattern performance and H/V ratio than dual dipole
designs, providing more rubust coverage.
Low downward radiation options available — contact factory.
3-1/8" EIA
Bay Dimensions (without Radome):
Diameter
36" (915mm)
Height 29" (737mm)
Bay Dimensions (with Radome):
Diameter
44" (1118mm)
Height 34" (864mm)
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
25
Multi-station DCR Antennas
DCR-M / HDR-M
Mounting Dimensions
Ha = Antenna aperture length
Hc = Antenna center of radiation
Ho = Antenna overall length needed for mounting
Ha = 984/f x [s(x-1)]
Hc = Ha/2
Ho = Ha + 5’+ 10’ - 5”
Ho = Ha + 5’+ 5’
Ha
Ha
Ho
Hc
All dimensions in feet
f = frequency in megahertz (MHz)
s = bay spacing in fraction of wavelengths
example: ½ wavelength = .5
x = number of antenna bays
Ho
Note: Antennas ordered w/beam tilt and/or null fill
are supplied with center feed and require an even
number of bays
Power (nominal per bay): 1200 W
11’-0”
Voltage: may be wired for 208 V or
240 V service, single or three phase.
10’-5”
Optional: Ice sensor and deicer controller
Pole Mounting
Side Mounting
End-Fed 1-7 Sections
Center-Fed
Mechanical Specifications
Antenna
# of Without Radomes With Radomes
With Deicers
Type
Bays Weight lbs (kg)
CaAc ft2 (m3)
Weight lbs (kg)
CaAc ft2 (m3)
Weight lbs (kg)
CaAc ft2 (m3)
1
1
1
1
1
1/ λ
DCR-C or
λ
/2 λ
λ
/2 λ
λ
/2 λ
λ
/2 λ
λ
/2 λ
λ
2
HDR-C
SpacedSpaced SpacedSpaced Spaced Spaced Spaced Spaced SpacedSpacedSpacedSpaced
DCR-M1
HDR-M1
DCR-M2
HDR-M2
DCR-M3
HDR-M3
DCR-M4
HDR-M4
DCR-M5
HDR-M5
DCR-M6
HDR-M6
DCR-M7
HDR-M7
DCR-M8
HDR-M8
DCR-M10
HDR-M10
DCR-M12
HDR-M12
1
160 (73)
6.6 (0.6)
303 (137)
2
258 (117)
243 (110) 12.9 (1.2) 11.4 (1.1)
543 (246)
528 (239)
22.1 (2.1)
20.6 (1.9)
268 (122) 253 (115) 13.9 (1.3) 12.4 (1.2)
3
355 (161) 325 (147) 19.2 (1.8) 16.2 (1.5)
783 (355)
753 (342)
33.0 (3.1)
30.0 (2.8)
370 (168) 340 (154) 20.7 (1.9) 17.7 (1.6)
4
453 (205) 408 (185) 25.5 (2.4) 21.0 (2.0) 1023 (464)
978 (444)
43.9 (4.1)
39.4 (3.7)
473 (215) 428 (194) 27.5 (2.6) 23.0 (2.1)
5
550 (250) 490 (222) 31.8 (3.0) 25.8 (2.4) 1263 (573) 1203 (546)
54.9 (5.1)
48.9 (4.5)
575 (261) 515 (234) 34.3 (3.2) 28.3 (2.6)
6
648 (294) 573 (260) 38.1 (3.5) 30.6 (2.8) 1503 (682) 1428 (648)
65.8 (6.1)
58.3 (5.4)
678 (308) 603 (274) 41.1 (3.8) 33.6 (3.1)
7
745 (338) 655 (297) 44.3 (4.1) 35.3 (3.3)
1653 (750)
76.6 (7.1)
67.6 (6.3)
780 (354) 690 (313) 47.8 (4.4) 38.8 (3.6)
8
886 (402) 781 (354) 50.9 (4.7) 40.4 (3.8) 1983 (899) 1878 (852)
87.8 (8.2)
77.3 (7.2)
926 (420) 821 (372) 54.9 (5.1) 44.4 (4.1)
10 1081 (490) 946 (429) 63.5 (5.9) 50.0 (4.6) 2433 (1104) 2298 (1042) 110.0 (10.2) 96.5 (9.0)
1131 (513) 966 (438) 68.5 (6.4) 55.0 (5.1)
12
1743 (791)
11.2 (1.0)
165 (75)
7.1 (0.7)
1276 (579) 1111 (504) 76.1 (7.1) 59.6 (5.5) 2883 (1308) 2718 (1233) 131.0 (12.2) 115.0 (10.6) 1336 (606) 1171 (531) 82.1 (7.6) 65.6 (6.1)
Notes:
1. CaAc and weight includes bays and standard extension brackets for mounting. Excludes custom mounts. For
antennas that include pattern studies, contact factory for additional information.
2. Dimensions are for antennas at 98.0 MHz and can vary ± 10% across the band.
3. Ice shields are strongly recommended for areas subject to icing conditions. Dielectric is not responsible for antenna
damage caused by impact from falling ice.
4. Calculated area (CaAc) expressed in TIA/EIA-222-F standard.
5. Specs. are for a single DCR-M antenna array or HDR-M antenna array, not both.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
26
Multi-station DCR Antennas
DCR-M / HDR-M
Electrical Specifications
Antenna Type
DCR-M or HDR-M
DCR-M1
HDR-M1
DCR-M2
HDR-M2
DCR-M3
HDR-M3
DCR-M4
HDR-M4
DCR-M5
HDR-M5
DCR-M6
HDR-M6
DCR-M7
HDR-M7
DCR-M8
HDR-M8
DCR-M10
HDR-M10
DCR-M12
HDR-M12
Gain Polarization spacing1
1/ λ Spacing
λ Spacing
2
Power Gain
dB
Power Gain
dB
Power
Rating kW3
0.46
-3.37
18
1.0
0
0.7
-1.55
36
1.5
1.76
1.0
0
40
2.1
3.22
1.3
1.14
40
2.7
4.31
1.6
1.76
40
3.2
5.05
1.8
2.55
40
3.8
5.80
2.1
3.22
40
4.3
6.34
2.3
3.62
40
5.5
7.40
2.9
4.62
40
6.6
8.2
3.5
5.44
40
Notes:
1. RMS gain data is given relative to dipole. Values are for midband and include standard harness configurations.
Actual gain will vay depending on feed system, frequency, null fill, and beam tilt.
2. Average power ratings are nominal @ 40°C ambient. Assumes constant pressurization with dry air or nitrogen.
Ratings may vary based on specific feed system design and local conditions.
3. Higher power ratings and custom feed systems may be available on request.
4. Antenna components and feed harnesses are optimized for FM channels of interest
5. Specs. are for a single DCR-M antenna array or HDR-M antenna array, not both.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
27
Multi-station DCR Antennas
DCR-MT Series Quadrapole Antenna
• 18 kW Per Bay
• Broadband
• Omnidirectional within 1 dB
• Low ice sensitivity, deicers optional
• Circularly polarized
• Stainless steel construction
• Pole or tower top mount
The DCR-MT top mount version of the popular quadrapole antenna is
specifically designed for those applications where a near perfectly
omnidirectional signal is desired. This antenna is designed to be selfsupporting above the top of the mounting structure, thus eliminating the
pattern distortion that is caused by mounting the antenna on the side of a
metal tower or pole.
The high strength stainless steel construction provides an extremely rugged
radiating element that imposes minimal windload on the mounting structure.
The antenna base flange is designed to attach to a standard 6” pipe flange.
The inside diameter of a 6” pipe is large enough to pass a standard 3 1/8”
coax flange to feed the antenna. This antenna is currently available in a single
bay design. It is conservatively rated for 18 kW of input power. For more
information on this or other Dielectric products, please contact our factory.
Electrical Specifications
General Specifications
Polarization:Circular
Pattern Circularity in
Free Space: Gain1
Power (dB)1
Power
Rating kW2
DCR-MT1
0.46 (-3.37)
18
± 1 dB
VSWR (max.) at Input,
w/o field trim:
Top Mounted (±200 KHz) 1.05:1
Input: Antenna Type
3-1/8" EIA
Notes:
(1) Power gain in each polarization
(2) Power rating based on 40˚C (104˚F) ambient. Multiply values listed by 0.8 for
50˚C (122˚F) ambient. DCT-MT with greater power ratings are available.
Section Dimensions:
Diameter
36" (915mm)
Height 60" (1525mm)
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
28
DCR Antennas
DCR-C / HDR-C
• DCR-C: Right Hand Circularly Polarized
• Ideal for Class B and C stations
• HDR-C: Left Hand Circularly Polarized
• 10 kW for a single bay
• DCR-C/HDR-C IBOC compatible
• Fine matcher included
• Interleaved provides -40dB of isolation
• Radomes or integral deicers optional
• Stainless steel elements
• VSWR field adjustable
The DCR-C/HDR-C is circularly polarized with a power rating of 10 kW for
a single bay, and is available in stacked arrays of up to 12 bays with an
input rating to 40 kW. 14 and 16 bay arrays are available with special
VSWR specifications. For situations where ice formation is common, the
arrays can be equipped with optional electrical deicers or radomes. The
antenna is DC grounded for lightning protection and does not require
shorting stubs. Each array is supplied with an input fine matcher for field
optimization.
End-Fed or Center-Fed Arrays
Two power distribution methods are used with the DCR-C/HDR-C
antenna. The array is usually end-fed unless it includes beam tilt and/or
null fill. In this case, the sections are fed from a center point. The input
connection in either case is 3-1/8” EIA.
Beam Tilt and Null Fill
General Specifications
Polarization:Circular
Pattern Circularity in
Free Space: VSWR (max.) at Input,
w/o field trim:
Top Mounted
Side Mounted
± 1 dB
Beam tilt and/or null fill are optional extras on the DCR-C/HDR-C series.
These options are ordinarily specified for arrays of 8 bays or more. Arrays
with 6 bays or less may include one or both options and typically are
designed as a center-fed array.
Directional Arrays
1.2:1
1.5:1
The DCR-C/HDR-C antenna series is available in directional arrays which
are custom-built to the needs of the station.
VSWR (max.) at Input, w/field trim,
Top or Side Mounted
(100 KHz):
1.07:1
Input: 3-1/8" EIA
Bay Dimensions (without Radome):
Diameter
20.7” (526 mm)
Height 20” (503 mm))
Bay Dimensions (with Radome):
Diameter
30" (762mm)
Height 29" (737mm)
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
29
DCR Antennas
DCR-C / HDR-C
Mounting Dimensions
Ha = Antenna aperture length
Hc = Antenna center of radiation
Ho = Antenna overall length needed for mounting
Ha = 984/f x [s(x-1)]
Hc = Ha/2
Ho end-fed = Ha + 5’top + 10’ - 5”bottom
Ho center-fed = Ha + 5’top + 5’bottom
Ha
Ha
Ho
Hc
Hc
All dimensions in feet
f = frequency in megahertz (MHz)
s = bay spacing in fraction of wavelengths
example: ½ wavelength = .5
x = number of antenna bays
Ho
11’-0”
Note: Antennas ordered w/beam tilt and/or null fill
are supplied with center feed and require an even
number of bays
DEICER SPECIFICATIONS:
Power (nominal per bay): 600 W
10’-5”
Voltage: may be wired for 208 V or
240 V service, single or three phase.
Pole Mounting
Side Mounting
End-Fed 1-7 Sections
Center-Fed
Optional: Ice sensor and deicer controller
Mechanical Specifications
Antenna
Type
DCR-C or
HDR-C
DCR-C1
HDR-C1
DCR-C2
HDR-C2
DCR-C3
HDR-C3
DCR-C4
HDR-C4
DCR-C5
HDR-C5
DCR-C6
HDR-C6
DCR-C7
HDR-C7
DCR-C8
HDR-C8
DCR-C10
HDR-C10
DCR-C12
HDR-C12
# of Bays
Without Radomes With Radomes
With Deicers
Weight lbs (kg)
CaAc ft2 (m3)
Weight lbs (kg)
CaAc ft2 (m3)
Weight lbs (kg)
CaAc ft2 (m3)
1
1
1
1
1
1/ λ
λ
/2 λ
λ
/2 λ
λ
/2 λ
λ
/2 λ
λ
/2 λ
λ
2
SpacedSpaced SpacedSpaced Spaced Spaced Spaced Spaced Spaced SpacedSpacedSpaced
1
145 (66)
5.4 (0.5)
175 (79)
2
228 (103) 213 (97)
10.4 (1.0)
3
310 (141) 280 (127) 15.5 (1.4) 12.5 (1.2) 400 (181) 370 (168)
4
393 (178) 348 (158) 20.5 (1.9) 16.0 (1.5) 513 (233) 468 (212) 35.8 (3.3) 31.3 (2.9) 405 (184) 360 (163) 21.5 (2.0) 17.0 (1.6)
5
475 (215) 415 (188) 24.4 (2.3) 18.4 (1.7) 625 (283) 565 (256) 43.5 (4.0) 37.5 (3.5) 490 (222) 430 (195) 25.7 (2.4) 19.7 (1.8)
6
558 (253) 483 (219) 30.7 (2.9) 23.2 (2.2) 738 (335) 663 (301) 53.6 (5.0) 46.1 (4.3) 576 (261) 501 (227) 32.2 (3.0) 24.7 (2.3)
7
640 (290) 550 (250) 35.6 (3.3) 26.6 (2.5) 850 (386) 760 (345) 62.3 (5.8) 53.3 (5.0) 661 (300) 571 (259) 37.4 (3.5) 28.4 (2.6)
8
766 (347) 661 (300) 41.0 (3.8) 30.5 (2.8) 1006 (456) 901 (409) 71.6 (6.7)
10
901 (409) 766 (347) 51.1 (4.7) 37.6 (3.5) 1201 (545) 1066 (484) 89.3 (8.3) 75.8 (7.0) 931 (422) 796 (361) 53.6 (5.0) 40.1 (3.7)
12
1036 (470) 871 (395) 61.2 (5.7) 44.7 (4.2) 1396 (633) 1231 (558) 107.0 (9.9) 90.5 (8.4) 1072 (486) 907 (411) 64.2 (6.0) 47.7 (4.4)
8.9 (0.8)
288 (131) 273 (124)
9.2 (0.9)
18.0 (1.7)
148 (67)
5.7 (0.5)
16.5 (1.5) 234 (106) 219 (99) 10.9 (1.0) 9.4 (0.9)
27.0 (2.5) 24.0 (2.2) 319 (145) 289 (131) 16.25 (1.5) 13.3 (1.2)
61.1 (5.7) 790 (350) 685 (311) 43.0 (4.0) 32.5 (3.0)
Notes:
1. CaAc and weights include bays and standard extension brackets for mounting. Excludes feed custom mounts. For
antennas that include pattern studies, contact factory for additional information.
2. Dimensions are for antennas at 98.0 MHz and can vary ± 10% across the band.
3. Ice shields are strongly recommended for areas subject to icing conditions. Dielectric is not responsible for antenna
damage caused by impact from falling ice.
4. Calculated area (CaAc) expressed in TIA/EIA-222-F standard.
5. Specs. are for a single DCR-C antenna array or HDR-C antenna array, not both.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
30
DCR Antennas
DCR-C / HDR-C
Electrical Specifications
Antenna Type
DCR-C or HDR-C
DCR-C1
HDR-C1
DCR-C2
HDR-C2
DCR-C3
HDR-C3
DCR-C4
HDR-C4
DCR-C5
HDR-C5
DCR-C6
HDR-C6
DCR-C7
HDR-C7
DCR-C8
HDR-C8
DCR-C10
HDR-C10
DCR-C12
HDR-C12
Gain Polarization spacing
1/ λ Spacing
λ Spacing
2
Power Gain
dB
Power Gain
dB
Power
Rating kW3
0.46
-3.37
10
1.0
0
0.7
-1.55
20
1.5
1.76
1.0
0
30
2.1
3.22
1.3
1.14
40
2.7
4.31
1.6
2.04
40
3.2
5.05
1.8
2.55
40
3.8
5.80
2.1
3.22
40
4.3
6.34
2.4
3.8
40
5.5
7.40
3.1
4.91
40
6.6
8.2
3.7
5.68
40
Notes:
1. RMS gain data is given relative to dipole. Values are for midband and include standard harness configurations. Actual
gain will vary depending on feed system, frequency, null fill, and beam tilt.
2. Average power ratings are nominal @ 40˚C ambient. Assumes constant pressurization with dry air or nitrogen.
Ratings may vary based on specific feed system design and local conditions.
3. Higher power ratings and custom feed systems may be available on request.
4. Antenna components and feed harnesses are optimized for FM channels of interest.
5. Specs. are for a single DCR-C antenna array or HDR-C antenna array, not both.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
31
DCR Antennas
DCR-H / HDR-H
• DCR-H: Right Hand Circularly Polarized
• 4 kW for a single bay
• HDR-H: Left Hand Circularly Polarized
• Fine matcher included
• DCR-H/HDR-H IBOC compatible
• Radomes or integral deicers optional
• Interleaved provides >-40dB of isolation
• VSWR field adjustable
• Stainless steel elements
• No circulators required
• Ideal for Class A and B stations
The DCR-H/HDR-H antenna is a low-power version of the DCR-C/
HDR-C and is available in one through twelve bays with an input power
rating up to 12 kW. Each array is supplied with an input fine matcher for
field optimization. For situations where ice formation is common, the arrays
can be equipped with optional electrical deicers or radomes. The antenna is
DC grounded for lightning protection and does not require shorting stubs.
Each array is supplied with an input fine matcher for field optimization.
End-Fed or Center-Fed Arrays
Two power distribution methods are used with the DCR-H/HDR-H
antenna. The array is usually end-fed unless it includes beam tilt and/or
null fill. In this case, the sections are fed from a center point. The input
connection in either case is 1-5/8” EIA.
Beam Tilt and Null Fill
Beam tilt and/or null fill are optional extras on the DCR-H/HDR-H series.
If optional beam tilt or null fill is specified, the antenna is designed as a
center-fed array.
Directional Arrays
General Specifications
Polarization:Circular
The DCR-H/HDR-H antenna is available in directional arrays which are
custom-built to the needs of the station.
Pattern Circularity in
Free Space: Low downward radiation options available — contact factory.
VSWR (max.) at Input,
w/o field trim:
Top Mounted
Side Mounted
± 1 dB
1.2:1
1.5:1
VSWR (max.) at Input, w/field trim,
Top or Side Mounted
(±100 KHz):
1.07:1
Input: 1-5/8" EIA
Bay Dimensions (without Radome):
Diameter
20.7” (526 mm)
Height 20” (503 mm))
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
32
DCR Antennas
DCR-H / HDR-H
Mounting Dimensions
Ha = Antenna aperture length
Hc = Antenna center of radiation
Ho = Antenna overall length needed for mounting
Ha = 984/f x [s(x-1)]
Hc = Ha/2
Ho end-fed = Ha + 5’top + 10’ - 5”bottom
Ho center-fed = Ha + 5’top + 5’bottom
Ha
Ha
Ho
Hc
Hc
All dimensions in feet
f = frequency in megahertz (MHz)
s = bay spacing in fraction of wavelengths
example: ½ wavelength = .5
x = number of antenna bays
Ho
Note: Antennas ordered w/beam tilt and/or null fill
are supplied with center feed and require an even
number of bays
11’-0”
DEICER SPECIFICATIONS:
Power (nominal per bay): 600 W
10’-5”
Voltage: may be wired for 208 V or
240 V service, single or three phase.
Pole Mounting
Side Mounting
End-Fed 1-7 Sections
Center-Fed
Optional: Ice sensor and deicer controller
Mechanical Specifications
Antenna
# of Without Radomes With Radomes
With Deicers
Type
Bays Weight lbs (kg)
CaAc ft2 (m3)
Weight lbs (kg)
CaAc ft2 (m3)
Weight lbs (kg)
CaAc ft2 (m3)
1/ λ
1/ λ
1/ λ
1/ λ
1/ λ
1/ λ
DCR-C or
λ
λ
λ
λ
λ
λ
2
2
2
2
2
2
HDR-C
SpacedSpaced SpacedSpaced Spaced Spaced Spaced Spaced SpacedSpacedSpacedSpaced
DCR-H1
HDR-H1
DCR-H2
HDR-H2
DCR-H3
HDR-H3
DCR-H4
HDR-H4
DCR-H5
HDR-H5
DCR-H6
HDR-H6
DCR-H7
HDR-H7
DCR-H8
HDR-H8
DCR-H10
HDR-H10
DCR-H12
HDR-H12
1
108 (49)
3.7 (0.3)
2
176 (80)
169 (76)
3
243 (110)
228 (103) 10.6 (1.0)
4
7.1 (0.7)
138 (63)
7.5 (0.7)
111 (50)
4.0 (0.4)
6.3 (0.6)
182 (83)
175 (79)
14.7 (1.4)
13.9 (1.3)
182 (83)
175 (79)
7.6 (0.7)
6.8 (0.6)
9.0 (0.8)
333 (151)
318 (144)
22.1 (2.1)
20.5 (1.9)
252 (114) 237 (108) 11.4 (1.1) 9.8 (0.9)
311 (141)
289 (131) 14.1 (1.3) 11.7 (1.1)
431 (195)
409 (185)
29.4 (2.7)
27.0 (2.5)
323 (147) 301 (136) 15.1 (1.4) 12.7 (1.2)
5
378 (171)
348 (158) 16.4 (1.5) 13.2 (1.2)
528 (239)
498 (226)
35.5 (3.3)
32.3 (3.0)
393 (178) 363 (165) 17.7 (1.6) 14.5 (1.3)
6
446 (202) 409 (185) 21.1 (2.0) 17.1 (1.6)
626 (284)
589 (267)
44.0 (4.1)
40 (3.7)
464 (210) 427 (193) 22.6 (2.1) 18.6 (1.7)
7
513 (233)
468 (212) 24.4 (2.3) 19.6 (1.8)
723 (328)
678 (308)
51.1 (4.7)
46.3 (4.3)
534 (242) 489 (222) 26.2 (2.4) 21.4 (2.0)
8
624 (283) 572 (259) 28.2 (2.6) 22.6 (2.1)
864 (392)
812 (368)
58.8 (5.5)
53.2 (4.9)
648 (294) 596 (270) 30.2 (2.8) 24.6 (2.3)
10
714 (324) 647 (293) 35.1 (3.3) 27.9 (2.6)
1014 (460)
73.3 (6.8)
66.1 (6.1)
744 (337) 677 (307) 37.6 (3.5) 30.4 (2.8)
12
819 (371) 737 (334) 42.0 (3.9) 33.2 (3.1)
1179 (535)
947 (429)
1
097 (497)
87.8 (8.2)
79.0 (7.3)
855 (389) 773 (350) 45.0 (4.2) 36.2 (3.4)
Notes:
1. CaAc and weight includes bays and standard extension brackets for mounting. Excludes custom mounts.
For antennas that include pattern studies, contact factory for additional information.
2. Dimensions are for antennas at 98.0 MHz and can vary ± 10% across the band.
3. Ice shields are strongly recommended for areas subject to icing conditions. Dielectric is not responsible for antenna
damage caused by impact from falling ice.
4. Calculated area (CaAc) expressed in TIA/EIA-222-F standard.
5. Specs. are for a single DCR-H antenna array or HDR-H antenna array, not both.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
33
DCR Antennas
DCR-H / HDR-H
Electrical Specifications
Antenna Type
DCR-H or HDR-H
DCR-H1
HDR-H1
DCR-H2
HDR-H2
DCR-H3
HDR-H3
DCR-H4
HDR-H4
DCR-H5
HDR-H5
DCR-H6
HDR-H6
DCR-H7
HDR-H7
DCR-H8
HDR-H8
DCR-H10
HDR-H10
DCR-H12
HDR-H12
Gain Polarization spacing
1/ λ Spacing
λ Spacing
2
Power Gain
dB
Power Gain
dB
Power
Rating kW3
0.46
-3.37
4
1.0
0
0.7
-1.55
8
1.5
1.76
1.0
0
12
2.1
3.22
1.3
1.14
12
2.7
4.31
1.5
1.76
12
3.2
5.05
1.8
2.55
12
3.8
5.80
2.1
3.22
12
4.3
6.34
2.4
3.80
12
5.5
7.40
3.0
4.77
12
6.6
8.2
3.6
5.56
12
Notes:
1. RMS gain data is given relative to dipole. Values are for midband and include standard harness configurations. Actual
gain will vay depending on feed system, frequency, null fill, and beam tilt.
2. Average power ratings are nominal @ 40˚C ambient. Assumes constant pressurization with dry air or nitrogen.
Ratings may vary based on specific feed system design and local conditions.
3. Higher power ratings and custom feed systems may be available on request.
4. Antenna components and feed harnesses are optimized for FM channels of interest
5. Specs. are for a single DCR-H antenna array or HDR-H antenna array, not both.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
34
Broadband Systems for Multiplexing Signals
DCR-S / DCR-M
• Superior bandwidth for analog or -10dB
IBOC, or both
• Low VSWR
• Broadband arrays from 1/2 wave spaced
to full wave spacing (see chart)
• High input power capability
• Arrays from 2 to 12 bays
• Circular polarization
• Left or right hand polarization
• Full FM band operation available in 1/2
spaced arrays
• Series fed arrays
• Simple design leads to ease of installation
• Common amplification or high level combined with single input
• Beam tilt and null fill available
• Radomes or deicers available
Dielectric offers DCR-M and DCR-S models at ½ wavelength spacing that
can cover the entire FM band for purposes of multiplexing signals. The
broadband DRCM and DCR-S antennas can be fed with a single line input
or a dual input for redundancy purposes.
The input power can be significantly higher than our DCR-M models and
we can feed with dual 6” inputs. Average Power ranges from 40 kW to
over 120 kW are available and each system is quickly designed to meet the
needs of the broadcaster and market they serve.
The antenna design is offered with customer required beam tilt and null fill
requirements. Custom selections are engineered and manufactured at our
facility. In addition, both the DCR-M and DCR-S are offered with heaters
and radomes.
The full band operation allows broadcasters to simulcast from one antenna.
The antenna is designed to handle the peak power of multiple signals
including IBOC signals at -10 dB. The DCR-S was designed to handle
more stations at a higher safety margin for multipke signals including IBOC
at -10 dB. The higher peak power design should be considered. Dielectric
takes pride in the safe power levels at the design stage to ensure the
broadcaster has an antenna that will produce sound quality signals for
many years.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
35
Broadband Systems for Multiplexing Signals
DCR-S / DCR-M
Dielectric FM Achievable Bandwidths
1/2 Wave Spaced
Funky Elbow
Full Wave Spaced
2E
15 MHz
7 MHz
5 MHz
2C
12 MHz
7 MHz
5 MHz
3E
15 MHz
7 MHz
5 MHz
4E
8 MHz
5 MHz
3 MHz
4C
15 MHz
7 MHz
5 MHz
5E
6 MHz
4 MHz
3 MHz
5C
15 MHz
7 MHz
5 MHz
6E
5 MHz
4 MHz
3 MHz
6C
15 MHz
7 MHz
5 MHz
8C
8 MHz
5 MHz
3 MHz
10C
15 MHz
7 MHz
5 MHz
12C
15 MHz
7 MHz
5 MHz
E = End Fed
C = Center Fed
Notes:
Discuss additional bandwidth considerations with Dielectric sales representative.
Additional bandwidths available upon request.
Refer to DCR-S/HDR-S (pages 20-22) and DCR-M/HDR-M (pages 25-27) for specifications.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
36
Full Band Master or Auxiliary FM Antennas
DCR-S / DCR-M
• Circular polarization
• Simple design leads to ease of installation
• Left or right hand polarization
• Designed for analog and -10dB IBOC signals
• Full FM band operation
• Common amplification or high level combined with single input
• Low VSWR
• 1/2 wave spaced arrays
• Series fed arrays
• Beam tilt and null fill available
• High input power capability
• Radomes or deicers available
Dielectric offers DCR-M and DCR-S models at ½ wavelength spacing that
can cover the entire FM band for purposes of multiplexing signals. The
auxiliary antenna is designed for a 4 bay or 6 bay antenna and can handle
multiple signals including IBOC signals at -10 dB.
The input power can be significantly higher than our typical DCR-M models
and we can feed with a 6” input. Average Power ranges from 40 kW to over
120 kW are available and each system is quickly designed to meet the needs
of the broadcaster and market they serve. This auxilary antenna is designed to
quickly deploy to site and give the customer flexibilty. In addition the antenna
design allows the installer to quickly install. In addition the design is simple
which yields a simplistic install that is error free. In addition both the DCR-M
and DCR-S is offered with heaters and radomes.
The full band operation allows broadcatsres to simulcast from one antenna
in emergency situations or when the main antenna is being maintained or
serviced. The antenna is designed to handle the peak power of multiple
signals including IBOC signals at -10 dB. The DCR-S was designed to
handle more stations at a higher safety margin for multipkle signals
including IBOC at -10 dB. The higher peak power design should be
considered. Dielectric takes pride in the safe power levels at the design
stage to ensure the broadcaster has an antenna that will produce sound
quality signals for many years.
Notes:
System VSWR or 6 bay installed system.
Typical response for non-commercial band.
System includes 1200' of transmission line.
Refer to DCR-S/HDR-S (pages 20-22) and DCR-M/HDR-M (pages 25-27)
for specifications.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
37
Full Band Master or Auxiliary FM Antennas
DCR-S / DCR-M
Dielectric FM Achievable Bandwidths
1/2 Wave Spaced
Funky Elbow
Full Wave Spaced
2E
15 MHz
7 MHz
5 MHz
2C
12 MHz
7 MHz
5 MHz
3E
15 MHz
7 MHz
5 MHz
4E
8 MHz
5 MHz
3 MHz
4C
15 MHz
7 MHz
5 MHz
5E
6 MHz
4 MHz
3 MHz
5C
15 MHz
7 MHz
5 MHz
6E
5 MHz
4 MHz
3 MHz
6C
15 MHz
7 MHz
5 MHz
8C
8 MHz
5 MHz
3 MHz
10C
15 MHz
7 MHz
5 MHz
12C
15 MHz
7 MHz
5 MHz
E = End Fed
C = Center Fed
Notes:
Discuss additional bandwidth considerations with Dielectric sales representative.
Additional bandwidths available upon request.
Refer to DCR-S/HDR-S (pages 20-22) and DCR-M/HDR-M (pages 25-27) for specifications.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
38
DCR Antennas
DCR-L
• 1 kW for a single bay
• Circularly polarized
• Pressurization not required
• Stainless steel construction
• Very low weight and windload
• Option available for field adjustable arms to any
FM frequency
The DCR-L antenna series is intended for use by the low power
broadcaster. The DCR-L is available in arrays from one to six sections.
The antennas are constructed of stainless steel and are suitable for use in
any environment. The type N connectors are weather tight so that no
pressurization is needed. Low windload radomes are available for areas
where protection from icing is desired.
Feed System
The feed system has a type N female input and can be used up to 1 kW.
The interbay feedline is flexible coax cable. Custom feed systems are
available for several variations including special bay spacing to minimize
downward radiation.
Mounting
The DCR-L antennas are made with an integral mount designed to attach
to a tower leg or pole from 1" to 3-1/2" in diameter.
Typical Installation
Detail
* λ in inches =
11803
Frequency in MHz
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
39
DCR Antennas
DCR-L
Electrical Specifications
Antenna
Type
Gain Polarization1
1/ λ Spacing
λ Spacing
2
Power Gain
dB
Power Gain
dB
DCR-L1
Power
Rating kW3
0.46 -3.370.46 -3.37 1
DCR-L2
1.0
0
0.70
-1.55
1
DCR-L3
1.5
1.76
1.00
0
1
DCR-L4
2.1
3.22
1.30
1.14
1
DCR-L6
3.2
5.05
1.80
2.55
1
1. RMS gain data is given relative to dipole. Values are for each polarization and nominal for midband and include
standard harness configurations. Actual gain will vary depending on feed system, frequency, null fill and bean tilt.
2. Average power ratings are nominal @ 40°C ambient. Assumes constant pressurization with dry air or nitrogen.
Ratings may vary based on specific feed system design and local conditions.
3. If specified, antenna components and feed harnesses are optimized for FM channels of interest.
Mechanical Specifications
Antenna
Type
Without Radomes With Radomes
# of
bays
Weight
lbs (kg)
Windload
lbs (kg)
Projected Area ft2 (m2)
Weight
lbs (kg)
Windload
lbs (kg)
Projected
Area ft2 (m2)
DCR-L1
1
8 (4)
30 (14)
0.6 (0.1)
18 (8)
88 (40)
1.8 (0.2)
DCR-L2
2
31 (14)
75 (34)
1.5 (0.1)
51 (23)
176 (80)
3.5 (0.3)
DCR-L3
3
39 (18)
105 (48)
2.1 (0.2)
69 (31)
264 (120)
5.3 (0.5)
DCR-L4
4
47 (21)
135 (61)
2.7 (0.3)
87 (40)
352 (160)
7 (0.7)
DCR-L6
6
63 (29)
195 (89)
3.9 (0.4)
123 (56)
528 (240)
10.6 (1.0)
Notes:
1. Weights include bays and standard extension brackets for mounting. Excludes feed system and custom mounts. For
antennas that included pattern studies, contact factory for additional information.
2. Projected area includes bays and standard extension brackets. Excludes feed system and custom mounts.
3. Dimensions are for antennas at 98.0 MHz and can vary ±10% across the band.
4. Ice shields are strongly recommended for areas subject to tower icing. Dielectric is not responsible for antenna
damage caused by impact from falling ice.
5. Area calculated expressed in terms of equivalent flats (RS-222-C-standard).
6. Windload force calculated based on 50 pounds per square foot (50psf) on flats (RS-222-C-standard).
7. To convert area to equivalent rounds, multiply area by 1.5.
8. To convert area to Aerodynamic area (CaAa - linear or CaAc - discrete) based on EIA-222-F standard,
multiply area by 1.8.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
40
DCR Antennas
DCR-T
• Band tunable
• Economical
• IBOC compatible
• Aluminum elements
• Ideal for Class A and B stations
• 1 kW for single bay*
• VSWR field adjustible
• Ease of installation
• Lightweight
The DCR-T antenna is a low-power version of the DCR-H and is available in
one through eight bays with an input power rating up to 8 kW. Each array is
field tunable and can be optimized anywhere on the FM dial. The antenna is
DC grounded for lightning protection and does not require shorting stubs.
Branch-Fed Arrays
The array is branch-fed. In this case, the sections are fed from a power
divider and each element is 50 Ω (Ohm). The input connection is 1-5/8” EIA.
Full wave and half wavelength options available. Upon request, other
wavelength spacings are available.
Beam Tilt and Null Fill
General Specifications
Polarization:Circular
Beam tilt and/or null fill are optional extras on the DCR-T series.
Pattern Circularity in
Free Space: Mounting Dimensions
VSWR (max.) at Input,
w/o field trim:
Top Mounted
Side Mounted
± 1 dB
1.2:1
1.5:1
VSWR (max.) at Input, w/field trim,
Top or Side Mounted
(±100 KHz):
1.07:1
Input: 1-5/8" EIA
Bay Dimensions (without Radome):**
Diameter
20.7” (526 mm)
Height 20” (503 mm))
Side Mounting
Ha = Antenna aperture length
Hc = Antenna center of radiation
Ho = Antenna overall length needed for
mounting
Ha = 984/f x [s(x-1)]
Hc = Ha/2
Ho center-fed = Ha + 5’top + 5’bottom
All dimensions in feet
f = frequency in megahertz (MHz)
s = bay spacing in fraction of wavelengths
example: ½ wavelength = .5
x = number of antenna bays
*Other power ratings available, please contact factory.
**Other input sizes available upon request.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
41
DCR Antennas
DCR-T
Electrical Specifications
Antenna
Type
Gain Polarization spacing
λ Spacing
Power Gain
dB
Power
Rating kW3
DCRT1
0.46
-3.37
1
DCRT2
1.0
0
2
DCRT3
1.5
1.76
3
DCRT4
2.1
3.22
4
DCRT5
2.7
4.31
5
DCRT6
3.2
5.05
6
DCRT7
3.8
5.80
7
DCRT8
4.3
6.34
8
Notes:
1. RMS gain data is given relative to dipole. Values are for
midband and include standard harness configurations.
Actual gain will vay depending on feed system, frequency,
null fill, and beam tilt.
2. Average power ratings are nominal @ 40˚C ambient.
Ratings may vary based on specific feed system design
and local conditions.
3. Higher power ratings and custom feed systems may be
available on request.
4. Antenna components and feed harnesses are optimized
for FM channels of interest.
Mechanical Specifications
Antenna
# of Weight lbs (kg)
1/ λ Spaced
TypeBays
λ Spaced
2
CaAc ft2 (m3)
1/ λ Spaced
λ Spaced
2
DCRT1
1
17.5 (8.0)
17.5 (8.0)
2.4 (0.22)
2.4 (0.22)
DCRT2
2
47.4 (21.5)
46.5 (21.1)
6.0 (0.56)
5.7 (0.53)
DCRT3
3
67.9 (30.9)
66.1 (30.0)
9.4 (0.87)
8.8 (0.82)
DCRT4
4
90.2 (41.0)
86.0 (39.1)
13.3 (1.24)
12.0 (1.11)
DCRT5
5
114.0 (51.8)
106.5 (48.4)
17.8 (1.65)
15.4 (1.43)
DCRT6
6
145.8 (66.3)
142.2 (64.6)
20.3 (1.89)
18.8 (1.74)
DCRT7
7
168.3 (76.5)
162.0 (73.6)
24.6 (2.29)
22.0 (2.04)
DCRT8
8
190.4 (86.5)
182.0 (82.7)
28.7 (2.67)
25.3 (2.35)
Notes:
1. CaAc and weight include bays, power
dividers, inter-bay feedlines, and standard
extension brackets for mounting.
2. Dimensions are for antennas at 98.0 MHz
and can vary across the band.
3. Wind area (CaAc) is calculated per the
TIA/EIA-222-F standard.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
42
DCV Antennas
Vertically Polarized Medium Power FM Antenna
• 1 kW for a single bay
• Low Cost
• Low Windload
• Vertical Polarization
• High Power Handling
• Lightweight aluminum construction
• Input Power up to 40 kW
• VSWR Field Adjustable
The DCV antenna is designed for installations where a high power vertical
polarization antenna is desired. It has an input power rating of 5 kW per
bay. It is available in stacked arrays of up to 8 sections with an input power
rating of 40 kW.
The Dipole element is made of lightweight aluminum tubing with a
protective coating of iridite, resulting in a strong and lightweight structure.
Where required, low windload radomes are available as an option.
Power gain is proportional to the number of dipoles in the array. Each dipole
provides approximately 1.0 gain (0 dB). This factor improves slightly with
the number of sections in the array as well as with directional patterns.
Contact the factory to determine the gain for your application.
The bandwidth of the DCV antenna allows for the use with multi-station
applications. The VSWR over a 6 MHz band using a branch feed system is
1.2:1.0. The VSWR using an end fed configuration is 1.2:1.0 over a 3 MHz
band.
Diplexing equipment and transmission line for multi-station systems can be
provided by Dielectric allowing one supplier for all your RF requirements.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
43
Panel Antenna
DCPJ
• Omni or directional radiation pattern
• Single input per panel
• Economic design for single
station operation
• Fine matcher included
• Single line or split feed arrangements
• Available in arrays of 1 to 12 layers
• Designed for -10dB IBOC signals
• Optional radomes
• Input: 3-1/8" 50 ohm EIA
• Multi-station options available
The DCPJ Cross Dipole FM Panel Antennas are designed to provide circularly polarized
transmission for single station operation at an economical cost where optimum circularity
of pattern or controlled directional characteristics are the prime requisites. The antenna is
designed for face mounting, three panels per layer, around a triangular tower structure.
Single or multi-layer operation is used, depending on the gain desired.
Feed System
The feed system is simple, comprised of a single 3-1/8" input with power dividers
feeding each panel. The feed system is fully pressurized. Elements are at DC ground for
lightning protection.
Radome Protection
For situations where ice formation is common the elements can be equipped with
optional radomes.
Gains and Power Rating
RMS gains from 0.46 (-3.37dB) to 6.6 (8.2dB) are available.
Options
Electrical beam tilt and null fill are available.
Accommodates Split-Feed System
The DCPJ antenna is designed to operate with a single 3-1/8" array input however, the
array may be configured to operate with two transmission lines between the array and
the transmitter. In the event of failure of some array component, the inoperable half can
be switched out of service and operation continued from the other half of the array at
reduced ERP until the outage is corrected. Appropriate switching arrangements in the
transmitter room will feed either or both portions.
Pattern Circularity
On towers of triangular cross section up to 7-1/2 foot face width, the
following omnidirectional circularity values can be obtained:
Horizontally Polarized Component:
+/-2 dB average
Vertically Polarized Component:
+/-2.5 dB average
On towers of triangular cross section with an 8 to 10 foot face width, the anticipated
circularity is:
Horizontally Polarized Component:
+/-2 dB average
Vertically Polarized Component:
+/-3 dB average
Tower member configuration does influence circularity. Optional scaled pattern
measurements taking into account the actual tower configuration provide more precise
data.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
44
Panel Antenna
DCPJ
Input VSWR
At the input to the antenna feed system the VSWR is 1.1:1 or better across the station channel bandwidth with field
adjustment of the variable transformer provided.
Windloads
The antenna is designed to withstand winds of 110 mph. Under those conditions the windload on a layer of panels is
shown in the table below. The values were calculated as follows:Windload =Frontal Windload +(2)(Frontal Windload)(cos
60 degrees). Therefore the tabulated values do not include the effect of the tower or assume any shielding of one panel
by another panel.
Weights for the various numbers of layers are also given.
Electrical Specifications
Antenna Type
# of
Gain Polarization1
Power
layers
λ Spacing Rating kW3
Power Gain
dB
DCPJ-1
1
0.46
-3.37
10
DCPJ-2
2
1.0
0
20
DCPJ-3
3
1.5
1.76
30
DCPJ-4
4
2.1
3.22
40
DCPJ-5
5
2.7
4.31
45
DCPJ-6
6
3.3
5.19
45
DCPJ-8
8
4.4
6.43
45
DCPJ-10
10
5.5
7.40
45
DCPJ-12
12
6.6
8.20
45
Notes:
1. RMS gain data is given relative to dipole. Values are for each polarization and nominal for
midband and include standard harness configurations. Actual gain will vary depending on feed system, frequency, null
fill and bean tilt.
2. Average power ratings are nominal @ 40°C (104˚F) ambient. Assumes constant pressurization with dry air or nitrogen. Ratings may vary based on specific feed system design and local conditions.
3. Higher power ratings and custom feed systems may be available on request.
4. Antenna components and feed harnesses are optimized for FM channels of interest.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
45
Panel Antenna
DCPJ
Mechanical Specifications
Antenna Type
# of
Without Radomes
layers
Weight
Windload
lbs (kg)
lbs (kg)
Projected Area
ft2 (m2)
DCPJ-1
1
925 (421)
850 (387)
17 (1.6)
DCPJ-2
2
1,700 (774)
1,700 (774)
34 (3.2)
DCPJ-3
3
2,475 (1,126)
2,550 (1,160)
51 (4.7)
DCPJ-4
4
3,365 (1,531)
3,400 (1,547)
68 (6.3)
DCPJ-5
5
4,250 (1,934)
4,250 (1,934)
85 (7.9)
DCPJ-6
6
5,180 (2,357)
5,100 (2,321)
102 (9.5)
DCPJ-8 8
6,875 (3,128)
6,800 (3,094)
136 (12.6)
DCPJ-10 10
8,620 (3,922)
8,500 (3,868)
170 (15.8)
DCPJ-12
12
10,350 (4,709)
10,200 (4,641)
204 (19.0)
Notes:
1. Weights include bays and standard extension brackets for mounting. Excludes feed system and custom mounts. For
antennas that included pattern studies, contact factory for additional information.
2. Projected area excludes feed system and custom mounts.
3. Dimensions are for antennas at 98.0 MHz and can vary ±10% across the band.
4. Ice shields are strongly recommended for areas subject to tower icing. Dielectric is not responsible for antenna
damage caused by impact from falling ice.
5. Area calculated expressed in terms of equivalent flats (RS-222-C-standard).
6. Windload force calculated based on 50 pounds per square foot (50psf) on flats (RS-222-C-standard).
7. To convert area to equivalent rounds, multiply area by 1.5.
8. To convert area to Aerodynamic area (CaAa - linear or CaAc - discrete) based on EIA-222-F standard, multiply area
by 1.8.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
46
Pattern Study
Dielectric offers state-of-the-art anechoic chamber FM pattern
measurements, or full-scale pattern measurements.
A PATTERN STUDY measures the effect a tower has on the antenna
signal. PATTERN OPTIMIZATION is a modification of the pattern to
meet specific customer requirements.
In a Pattern Study, the antenna is mounted on a replica of your tower
and measurements are made to determine the relative signal strength
around the tower. This replica includes all transmission line, waveguide
runs, conduit and ladder assemblies passing through the antenna
aperture. The measurements are repeated for different mountings and
orientations of the antenna and the data is used to select an antenna
mounting which best meets your requirements.
Optimization may require the addition of parasitic radiating elements to
be mounted near the antenna to the direct pattern in a more desired
direction.
Dielectric's FM azimuth pattern measurements are performed in the
specially designed anechoic chamber operating at 4.4 times FM carrier
frequencies. At this frequency, the antenna, tower structure, and
transmission lines can be accurately modeled to 4.4:1 scale. The
anechoic chamber allows for a more detailed study, in a noise and
reflection free environment, resulting in the most accurate results.
Test Method
The antenna/structure rotates 360 degrees while receiving a signal
from a source antenna. The source is fed by a signal generator with
directional coupler located at the antenna input. A reference signal is
obtained from this coupler and compared to the “receive” signal of the
antenna under test.
The transmit and scale model antennas are mounted at identical
elevations and at the opposite ends of the chamber. A network analyzer
supplies the RF signal to the source antenna at 4.4 times the
fundamental FM frequency. The network analyzer also receives the
signal that is intercepted by the antenna under test. The received signal
of each polarization is converted to a relative level, referenced to the
source. This level is stored on a computer acting as the master
controller. The computer controls the measurement system via IEEE488 control bus through a GPIB card.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
47
Pattern Optimization
0
Pre-Optimization
Pattern exemplifies vertical
component distortion caused by
mounting structure.
330
30
5 dB
10 dB
300
60
15 dB
Horizontal
Vertical
20 dB
5
270
10
15
20
20
15
10
5
90
20
15
240
120
10
5
210
150
180
0
Post Optimization
Using two parasitic elements
vertical circularity has improved to
near free space performance.
330
30
5 dB
10 dB
300
60
15 dB
Horizontal
Vertical
20 dB
5
270
10
15
20
20
15
10
5
90
20
15
240
120
10
210
5
150
180
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
48
FM Elevation Patterns
1
1
1
0.9
0.9
0.9
0.8
0.6
-5 dB
0.5
-3 dB
0.7
0.6
-5 dB
0.2
-10 dB
0.3
0
10
20
30 40 50 60 70
Degrees below Horizontal
80
-20 dB
0.1
0
2 Bay λ
0
10
20
30 40 50 60 70
Degrees below Horizontal
0
80
1
1
0.9
0.9
0.8
0.6
-5 dB
0.5
0.2
0
10
20
30 40 50 60 70
Degrees below Horizontal
80
1
1
0.9
0.8
0.6
-5 dB
0.5
0.6
-5 dB
-10 dB
0.3
0
10
20
30 40 50 60 70
Degrees below Horizontal
-20 dB
0.1
0
80
0
10
20
30 40 50 60 70
Degrees below Horizontal
80
4 Bay λ/2
0.8
-3 dB
0.7
-3 dB
0.7
0.2
-20 dB
2 Bay λ/2
0.9
80
0.4
-10 dB
0.1
0
20
30 40 50 60 70
Degrees below Horizontal
0.5
0.3
8 Bay λ
-3 dB
0.7
0.6
Check www.dielectric.com for
latest patterns and our DASP
(Dielectric System Planning software.)
-5 dB
0.5
0.4
0.4
-10 dB
0.3
0.2
-10 dB
0.3
0.2
-20 dB
0.1
0
-5 dB
0.2
-20 dB
0.1
0
0.6
0.4
-10 dB
0.3
10
0.8
-3 dB
0.7
0.5
0.4
0
6 Bay λ
1
-3 dB
-20 dB
0.1
0.9
0.7
-10 dB
0.3
4 Bay λ
0.8
-5 dB
0.2
0.2
-20 dB
0.1
0.6
0.4
0.4
-10 dB
0.3
-3 dB
0.7
0.5
0.5
0.4
0
0.8
0.8
-3 dB
0.7
0
10
20
30 40 50 60 70
Degrees below Horizontal
6 Bay λ/2
80
-20 dB
0.1
0
0
10
20
30 40 50 60 70
Degrees below Horizontal
80
8 Bay λ/2
Subject to change.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
49
RFR Considerations
Downward radiation, or RFR has been a concern of broadcasters for a
number of years. Regulations surrounding this issue will never get any
easier on the broadcaster. RFR poses interference problems to
neighboring electronic equipment, and exposure to non-ionizing radiation
is a serious health issue. Health concerns are a particular concern if the
antenna is installed near an area where people work or live.
Conscientious broadcasters are very concerned about their image in the
community as to providing a safe environment in which to work and live.
This poses numerous issues since a broadcast facility is an expensive
undertaking and is typically constructed as a permanent location for the
station. In many cases, it is difficult to predict what changes will occur in
the community surrounding the facility. Over the years, people have
chosen to locate their homes near broadcast facilities and even though
the radio station was there first, it becomes incumbent on the station to
make sure that the station doesn’t pose a hazard to their neighbors or to
interfere with their electronics.
Good engineering therefore dictates that a substantial safety factor be
included in the antenna design to avoid future problems and ever
tightening regulations. Most Dielectric side mounted antenna arrays can
be designed with reduced bay spacing, greatly reducing downward
radiation and the associated RFR concerns. Contact your Dielectric
representative for additional details.
Dielectric’s DCR series antennas are available in (N-1)/N and 1/2
wavelength designs to reduce RFR exposure. They offer a solution with
lower weight and windloading.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
50
Medium and High Power FM Filters
Medium and High Power Bandstop Filter
• For Indoor Applications
• FM and FM-HD Channel Bandwidths Compliance
• Temperature Compensated
• Modular Design
•Retunable
Bandstop filters are used to suppress interference from another broadcaster that is coming down the transmitter from the
antenna. These interfering signals can mix in a transmitter's high power amplifier and generate intermodulation products that
can interfere with another FM broadcaster. The notch is selected to match the transmitter power output. The filter is tuned to
pass the desired channel and the notch is tuned to the interfering frequency. A dual notch can be used for close channel
spacing or each notch in a dual can be tuned to two different interferers.
All Dielectric filters have been designed with HD radio in mind. The passband parameters are optimized over the complete FM
channel (+/- 200 kHz).
Every unit is factory tuned and may also be retuned in the field by the customer if desired. Dielectric's bandstop filters are
modular in design — a single notch can be expanded to two notches if more suppression or closer channel spacing is required.
Deeper notch depth is available for wider channel suppressions.
Specifications
Model Number
Frequency
Average Power Handling
Impedance
DFF-140-01BS
DFF-140-02BS
DFF-240-01BS
DFF-240-02BS
88…108MHz
88…108MHz
88…108MHz
88…108MHz
<=20kW
<=20kW
<=40kW
<=40kW
50 Ohms
50 Ohms
50 Ohms
50 Ohms
(Band Stop)
(Band Stop)
(Band Stop)
(Band Stop)
<=1.06
<=1.06
<=1.06
<=1.06
5,000FT (1,524M)
5,000FT (1,524M)
5,000FT (1,524M)
5,000FT (1,524M)
F02
<=0.1dB
<=0.13dB
<=0.1dB
<=0.1dB
Notch Depth
Notch Spacing
>=20dB
≥1.2MHz
>=20dB
≥0.8MHz
>=30dB
≥2.0MHz
>=30dB
≥0.8MHz
1
2
1
2
Type
VSWR
Altitude
1
Insertion Loss/Attenuation
Number of Cavities
Cavity Size
Group Delay Variation
Hybrids
14"
14"
24"
24"
<=25 ns
@+/-150Khz
<=30 ns
@+/-150Khz
<=25 ns
@+/-150Khz
<=30 ns
@+/-150Khz
N/A
N/A
N/A
N/A
EIA 3-1/8", 1-5/8"
EIA 3-1/8", 1-5/8"
EIA 3-1/8"
EIA 3-1/8"
Blowers and Shrouds
NO
NO
NO
NO
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
0-98%, non condensing
0-98%, non condensing
0-98%, non condensing
0-98%, non condensing
Connectors
Ambient/Storage Humidity
Material
Dimensions (LxWxH)
Weight3
Application
AL
AL
AL
AL
15"x15"x46"
15"x40"x46"
27"x27"x46"
27"x60"x46"
170Lbs. (77Kg)
340Lbs. (154Kg)
170Lbs. (77Kg)
410Lbs. (186Kg)
FM/FM-HD
FM/FM-HD
FM/FM-HD
FM/FM-HD
Notes
1) For more than 5,000 feet (1,524m), please consult the factory 2) F0 - Center Frequency
3)Estimated
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
51
Medium and High Power FM Filters
Medium Power Bandpass Filter
• For Indoor Applications
• FM and FM-HD Channel Bandwidths Compliance
• Temperature Compensated
• Modular Design
•Retunable
FM Bandpass Filters are used as building blocks for channel combiners or as stand-alone filters to
mitigate interference from nearby broadcasters. If there are several FM broadcasters on the same or
nearby antennas then there may be power passed down from the antenna to a high power transmitter.
This power can mix in the output stage of the high power amplifier and create intermodulation (IM)
products. A bandpass filter will both reduce the amount of interfering power applied to a transmitter
and also attenuate the resulting intermodulation product. At the frequency separation listed in the
"channel separation" row the filter will have at least 40 dB of rejection. This rejection assures
compliance with an -80dB IM specification regardless of transmitter turnaround loss.
All Dielectric filters have been designed with HD radio in mind. The passband parameters are optimized
over the complete FM channel (+/- 200 kHz).
Every unit is factory tuned and may also be retuned in the field if desired. Dielectric's bandpass filters are
modular in design: a three pole filter can be changed to a four or five pole by simply adding cavities.
Specifications
Model Number
DFF-140-02BP
DFF-140-03BP
DFF-140-04BP
DFF-140-05BP
88…108MHz
88…108MHz
88…108MHz
88…108MHz
Average Power Handling
<=25KW
<=20KW
<=15KW
<=12KW
Average Power with Blowers
<=30kW
<=25kW
<=20kW
<=17kW
Impedance
50 Ohms
50 Ohms
50 Ohms
50 Ohms
Frequency
4
VSWR
<=1.06
<=1.06
<=1.06
<=1.06
5,000FT (1,524M)
5,000FT (1,524M)
5,000FT (1,524M)
5,000FT (1,524M)
F02
<=0.15dB
<=0.25dB
<=0.35dB
<=0.45dB
F0+/-1.2 MHz
>=4.50dB
>=19.0dB
>=43.0dB
>=62.0dB
>=10.2MHz
>=2.8MHz
>=1.2MHz
>=0.8MHz
2
3
4
5
Altitude1
Insertion Loss/Attenuation
Channel Spacing
Number of Cavities
Cavity Size
14"
14"
14"
14"
<=30 ns
@+/-150Khz
<=50 ns
@+/-150Khz
<=70 ns
@+/-150Khz
<=160 ns
@+/-150Khz
N/A
N/A
N/A
N/A
EIA 3-1/8", 1-5/8"
EIA 3-1/8", 1-5/8"
EIA 3-1/8", 1-5/8"
EIA 3-1/8", 1-5/8"
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
0-98%, non condensing
0-98%, non condensing
0-98%, non condensing
0-98%, non condensing
AL
AL
AL
AL
28"x17"x57"
(711x432x1448mm)
42"x17"x57"
(1067x432x1448mm)
56"x17"x57"
(1423x432x1448mm)
70"x17"x57"
(1778x432x1448mm)
320Lbs (145Kg)
480Lbs (218Kg)
630Lbs (286Kg)
790Lbs (359Kg)
FM/FM-HD
FM/FM-HD
FM/FM-HD
FM/FM-HD
Group Delay Variation
Hybrids
Connectors
Ambient/Storage Humidity
Material
Dimensions (LxWxH)
Weight3
Application
Notes
3)Estimated
1) For more than 5,000 feet (1,524m), please consult the factory 4)Free convection cooled
2) F0 - Center Frequency
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
52
Medium and High Power FM Filters
High Power Bandpass and Bandstop Filters
• For Indoor Applications
• FM and FM-HD Channel Bandwidths Compliance
• Temperature Compensated
• Modular Design
•Retunable
Dielectric's High Power Bandpass and Bandstop Filters are custom designed
to address your station’s specific requirements. These units reduce intermod
and spurious product outputs to greater than 80 dB below carrier as specified
by the FCC.
All Dielectric filters have been designed with HD radio in mind. The passband
parameters are optimized over the complete FM channel (+/- 200 kHz).
Every unit is factory tuned and may also be retuned in the field if desired.
Dielectric's band-pass filters are modular in design, a three pole filter can be
changed to a four or five pole by simply adding cavities.
Specifications
Model Number
Frequency
DFF-240-02BP
DFF-240-03BP
DFF-140-04BP
DFF-240-05BP
88…108MHz
88…108MHz
88…108MHz
88…108MHz
Average Power Handling
<=35KW
<=28KW
<=23KW
<=20KW
Average Power with Blowers
<=45kW
<=38kW
<=33kW
<=30kW
Impedance
50 Ohms
50 Ohms
50 Ohms
50 Ohms
Reflective
(Band Pass)
Reflective
(Band Pass)
Reflective
(Band Pass)
Reflective
(Band Pass)
4
Type
VSWR
<=1.06
<=1.06
<=1.06
<=1.06
5,000FT (1,524M)
5,000FT (1,524M)
5,000FT (1,524M)
5,000FT (1,524M)
F02
<=0.10dB
<=0.15dB
<=0.25dB
<=0.35dB
F0+/-1.2 MHz
>=4.50dB
>=19.0dB
>=43.0dB
>=62.0dB
>=10.2MHz
>=2.8MHz
>=1.2MHz
>=0.8MHz
Altitude1
Insertion Loss/Attenuation
Channel Spacing
Number of Cavities
Cavity Size
Group Delay Variation
Hybrids
Connectors
2
3
4
5
24"
24"
24"
24"
<=30 ns
@+/-150Khz
<=50 ns
@+/-150Khz
<=70 ns
@+/-150Khz
<=160 ns
@+/-150Khz
N/A
N/A
N/A
N/A
EIA 3-1/8" to 6-1/8"
EIA 3-1/8" to 6-1/8"
EIA 3-1/8" to 6-1/8"
EIA 3-1/8" to 6-1/8"
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
0-98%, non condensing
0-98%, non condensing
0-98%, non condensing
0-98%, non condensing
AL
AL
AL
AL
48"x28"x57"
(1219x711x1448mm)
72"x28"x57"
(1829x711x1448mm)
96"x28"x57"
(2439x711x1448mm)
120"x28"x57"
(3048x711x1448mm)
360Lbs (164Kg)
545Lbs (247Kg)
723Lbs (328Kg)
900Lbs (408Kg)
FM/FM-HD
FM/FM-HD
FM/FM-HD
FM/FM-HD
Ambient/Storage Humidity
Material
Dimensions (LxWxH)
Weight3
Application
Notes
1) For more than 5,000 feet (1,524m), please consult the factory 3)Estimated
2) F0 - Center Frequency
4)Free convection cooled
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
53
FM Combiners
General Description
It is very common for FM transmitters, operating on different frequencies, to share a
common antenna. The hardware which enables this is the FM combiner. The main function
of the combiner is to combine each high power signal with low loss and maintain high
isolation between the transmitters. A second, somewhat less appreciated function is to
assure that the spurious and intermodulation products generated by combined transmitters
are attenuated below the level required by the FCC.
The spurious emissions of an FM transmitter are governed by FCC part 73. This requires
that any emission greater than 600 kHz from the carrier be at least -80 dB below the
carrier. When multiple transmitters are added in a combiner some amount of signal from
each added channel will mix with the main signal in the output stage of each transmitter.
This mixing generates intermodulation products which are output from the transmitter. The
frequency of the intermodulation product depends upon the frequency of the two (or more)
transmitters. Generally, 3rd order intermodulation products can lie in the FM band and are
easily transmitted by an FM antenna. The magnitude of the intermodulation product depends
upon the magnitude of the mixing signal, the turn-around loss of the transmitter and the
filtering at the respective frequencies. The filtering used to combine multiple transmitters
plays an auxiliary role in reducing the signal to be mixed and the resulting spurious caused
by the mixing. If the turn-around loss of the transmitters is known Dielectric will supply a
combiner which assures compliance with the FCC requirements.
All Dielectric filters are tuned with HD radio in mind. The full channel bandwidth (fc+/-200
kHz) has excellent match and minimized insertion loss/group delay. Output tee's and hybrids
are chosen to allow 10 dB IBOC operation with 2x voltage safety factor.
A branch combiner is an effective and economical way to combine two or three transmitters
onto a single line. This approach uses a single band-pass filter for each channel and "tees"
the power together at the output end. The delay lines between the filter and tees assure
minimum in-band loss and maximum isolation between transmitters. A branch combiner can
be used for channel spacing as small as 800 kHz.
A manifold combiner is recommended as an economical solution for combining three to ten
channels. This approach is similar to the branch combiner in that there is one filter per
channel. The output end consists of a "tee" for each channel arranged in a single manifold
line. There is an additional short-circuited stub at the end of the manifold which helps realize
compact delay lines for reduced overall size. The approach can also be used for channel
spacing as small as 800 kHz. For combinations of more than six channels contact the
factory for evaluation.
The constant impedance combiner is a standard FM combining approach. The reasons for
its prevalence are its excellent power handling, very high isolations and the ability to add
channels in the future with minimal interruption to the on air channels. A constant impedance
module consists of two band-pass filters, two 3 dB hybrids and a reject load. These modules
can be chained together to combine ten or more stations into a single antenna. The last
modules in the chain will see the combined power of all the added channels. The output
stage and hybrid of these last modules need to be sized correctly for the combined power.
One approach to combining IBOC transmitters with analog transmitters is to remove the
reject load from a constant impedance combining module and attach the digital transmitter
to this port. This results in the analog powers summing in one direction along the output
chain and the digital powers summing the opposite direction. Two feeds can be used to feed
the analog and digital portions of the antenna separately.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
54
FM Branch Combiners
2 Channel (Medium Power)
• For Indoor Applications
• Temperature Compensated
• High Isolation
• FM and FM-HD Channel Bandwidths Compliance
• Modular Design
Specifications
Model Number
Frequency
DFC14002BR2
DFC14003BR2
DFC14004BR2
DFC14005BR2
87.5…108MHz
87.5…108MHz
87.5…108MHz
87.5…108MHz
Branch Combiner
Branch Combiner
Branch Combiner
Branch Combiner
>=10.2MHz
>=2.8MHz
>=1.2MHz
>=0.8MHz
Average Power Handling
25KW (per INPUT)
20KW (per INPUT)
15KW (per INPUT)
12KW (per INPUT)
Average Power with Blowers
30KW (per INPUT)
25KW (per INPUT)
20KW (per INPUT)
17KW (per INPUT)
Temperature Compensated
YES
YES
YES
YES
<=0.15dB
<=0.25dB
<=0.35dB
<=0.45dB
Combiner Type
Channel Spacing
Input 1, 2
Insertion Loss
F01
VSWR
Group Delay Variation
Number of Cavities
Cavity Size
<=1.06
<=1.06
<=1.06
<=1.06
<=30nS @+/-150Khz
<=50nS @+/-150Khz
<=70nS @+/-150Khz
<=160nS @+/-150Khz
2
3
4
5
14"
14"
14"
14"
Input Connector
EIA 3-1/8"
EIA 3-1/8"
EIA 3-1/8"
EIA 3-1/8"
Output Connector
EIA 3-1/8"
EIA 3-1/8"
EIA 3-1/8"
EIA 3-1/8"
>=35dB
>=35dB
>=35dB
>=35dB
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators +
INVAR Roads
Isolation Between Inputs
Material
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C) 32˚F(0˚C) to 104˚F(+40˚C) 32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C) 32˚F(0˚C) to 122˚F(+50˚C) 32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
Dimensions (LxWxH)
Weight2
Altitude
3
Application
48"x28"x57"
(1219x711x1448mm)
72"x28"x57"
(1829x711x1448mm)
96"x28"x57"
(2439x711x1448mm)
120"x28"x57"
(3048mmx711mmx1448mm)
360Lbs (164Kg)
545Lbs (247Kg)
723Lbs (328Kg)
900Lbs (408Kg)
5,000ft (1524m)
5,000ft (1524m)
5,000ft (1524m)
5,000ft (1524m)
FM/FM-HD
FM/FM-HD
FM/FM-HD
FM/FM-HD
Notes
1) F0 - Center Frequency
2)Estimated
3) For more than 5,000 feet (1,524m), please consult the factory Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
55
FM Branch Combiners
2 Channel (High Power)
• For Indoor Applications
• Temperature Compensated
• High Isolation
• FM and FM-HD Channel Bandwidths Compliance
• Modular Design
Specifications
Model Number
Frequency
DFC24002BR2
DFC24003BR2
DFC24004BR2
DFC24005BR2
87.5…108MHz
87.5…108MHz
87.5…108MHz
87.5…108MHz
Branch Combiner
Branch Combiner
Branch Combiner
Branch Combiner
>=10.2MHz
>=2.8MHz
>=1.2MHz
>=0.8MHz
Average Power Handling
35KW (per INPUT)
28KW (per INPUT)
23KW (per INPUT)
20KW (per INPUT)
Average Power with Blowers
45KW (per INPUT)
38KW (per INPUT)
33KW (per INPUT)
30KW (per INPUT)
Temperature Compensated
YES
YES
YES
YES
<=0.10dB
<=0.15dB
<=0.25dB
<=0.35dB
Combiner Type
Channel Spacing
Input 1, 2
Insertion Loss
F01
VSWR
Group Delay Variation
Number of Cavities
Cavity Size
<=1.06
<=1.06
<=1.06
<=1.06
<=30nS @+/-150Khz
<=50nS @+/-150Khz
<=70nS @+/-150Khz
<=160nS @+/-150Khz
2
3
4
5
24"
24"
24"
24"
Input Connector
EIA 3-1/8"
EIA 3-1/8"
EIA 3-1/8"
EIA 3-1/8"
Output Connector
EIA 6-1/8"
EIA 6-1/8"
EIA 6-1/8"
EIA 6-1/8"
>=35dB
>=35dB
>=35dB
>=35dB
AL+Cu Resonators +
INVAR Roads
AL+Cu Resonators +
INVAR Roads
AL+Cu Resonators +
INVAR Roads
AL+Cu Resonators +
INVAR Roads
Isolation Between Inputs
Material
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C) 32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C) 32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
Dimensions (LxWxH)
Weight2
Altitude
3
Application
55"x66"x57"
(1397mmx1.677mm
x1.448mm)
79"x66"x57"
(2007mmx1.677mm
x1.448mm)
103"x66"x57"
(1.616mmx1.677mm
x1.448mm)
127"x66"x57"
(3226mmx1.677mm
x1.448mm)
740lb (336Kg)
1110lb (504Kg)
1466lb (665Kg)
1820lb (826Kg)
5,000FT (1,524m)
5,000FT (1,524m)
5,000FT (1,524m)
5,000FT (1,524m)
FM/FM-HD
FM/FM-HD
FM/FM-HD
FM/FM-HD
Notes
1) F0 - Center Frequency
2)Estimated
3) For more than 5,000 feet (1,524m), please consult the factory Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
56
FM Branch Combiners
3 Channel
• For Indoor Applications
• Temperature Compensated
• High Isolation
• FM and FM-HD Channel Bandwidths Compliance
• Modular Design
Specifications
Model Number
Frequency
DFC14003BR3
DFC14004BR3
DFC14005BR3
87.5…108MHz
87.5…108MHz
87.5…108MHz
Branch Combiner
Branch Combiner
Branch Combiner
>=2.8MHz
>=1.2MHz
>=0.8MHz
Average Power Handling
20KW (per INPUT)
15KW (per INPUT)
12KW (per INPUT)
Average Power with Blowers
25KW (per INPUT)
20KW (per INPUT)
17KW (per INPUT)
Temperature Compensated
YES
YES
YES
<=0.25dB
<=0.35dB
<=0.45dB
Combiner Type
Channel Spacing
Input 1, 2, 3
Insertion Loss
F01
VSWR
Group Delay Variation
Number of Cavities
Cavity Size
Input Connector
Output Connector
Isolation Between Inputs
Material
<=1.06
<=1.06
<=1.06
<=50nS @+/-150Khz
<=70nS @+/-150Khz
<=160nS @+/-150Khz
3
4
5
14"
14"
14"
EIA 3-1/8"
EIA 3-1/8"
EIA 3-1/8"
4-1/16" FLG
4-1/16" FLG
4-1/16" FLG
>=35dB
>=35dB
>=35dB
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C) 32˚F(0˚C) to 104˚F(+40˚C) 32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C) 32˚F(0˚C) to 122˚F(+50˚C) 32˚F(0˚C) to 122˚F(+50˚C)
Dimensions (LxWxH)
60"x66"x57"
(1524mmx1.677mm
x1.448mm)
73"x66"x57"
(1.854mmx1.677mm
x1.448mm)
107"x66"x57"
(2718mmx1.677mm
x1.448mm)
Weight2
1465lb (665Kg)
1925lb (873Kg)
2385lb (1082Kg)
Altitude3
5,000FT (1,524m)
5,000FT (1,524m)
5,000FT (1,524m)
FM/FM-HD
FM/FM-HD
FM/FM-HD
Application
Notes
1) F0 - Center Frequency
2)Estimated
3) For more than 5,000 feet (1,524m), please consult the factory Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
57
FM Branch Combiners
3 Channel
Dielectric's FM Branch Combiners are used when it is necessary to combine
two (or three) FM channels into a single master antenna. Dielectric’s combining
systems are designed in modular fashion. The diplexing module is the
fundamental building block. By cascading additional modules, new stations may
be added.
• For Indoor Applications
• Temperature Compensated
• High Isolation
• FM and FM-HD Channel
Bandwidths Compliance
All Dielectric filters have been designed with HD radio in mind. The passband
parameters are optimized over the complete FM channel (+/- 200 kHz).
• Modular Design
Specifications
Model Number
Frequency
DFC24003BR3
DFC24004BR3
DFC24005BR3
87.5…108MHz
87.5…108MHz
87.5…108MHz
Branch Combiner
Branch Combiner
Branch Combiner
>=2.8MHz
>=1.2MHz
>=0.8MHz
Average Power Handling
28KW (per INPUT)
23KW (per INPUT)
20KW (per INPUT)
Average Power with Blowers
38KW (per INPUT)
33KW (per INPUT)
30KW (per INPUT)
Temperature Compensated
YES
YES
YES
<=0.15dB
<=0.25dB
<=0.35dB
Combiner Type
Channel Spacing
Input 1, 2
Insertion Loss
F01
VSWR
Group Delay Variation
Number of Cavities
<=1.06
<=1.06
<=1.06
<=50nS @+/-150Khz
<=70nS @+/-150Khz
<=160nS @+/-150Khz
3
4
5
24"
24"
24"
Input Connector
EIA 3-1/8"
EIA 3-1/8"
EIA 3-1/8"
Output Connector
EIA 6-1/8"
EIA 6-1/8"
EIA 6-1/8"
>=35dB
>=35dB
>=35dB
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
P>=25KW (per INPUT)
P>=25KW (per INPUT)
Cavity Size
Isolation Between Inputs
Material
Blowers and Shrouds
P>=25KW (per INPUT)
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122F(50C)
32˚F(0˚C) to 122F(50C)
Dimensions (LxWxH)
90"x95"x57"
(2286mm x 2413mm
x1.448mm)
113"x95"x57"
(2870mmx2413mm
x1.448mm)
137"x95"x57"
(3480mmx2413mm
x1.448mm)
1660lb (753Kg)
2200lb (998Kg)
2730lb (1238Kg)
5,000FT (1,524m)
5,000FT (1,524m)
5,000FT (1,524m)
FM/FM-HD
FM/FM-HD
FM/FM-HD
Weight2
Altitude
3
Application
32˚F(0˚C) to 104F(+40C) 32˚F(0˚C) to 104F(+40C)
Notes
1) F0 - Center Frequency
2)Estimated
3) For more than 5,000 feet (1,524m), please consult the factory Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
58
FM Combiners (Manifold Type)
3 Channel to 10 Channel
• Combines 3 or more stations
• For Indoor Applications
• Temperature Compensated
• High Isolation
• FM and FM-HD Channel Bandwidths Compliance
• Modular Design
Manifold combiners are an excellent alternative to constant
impedance combiners. With proven performance up to 10
channels, a manifold will combine channels with less loss and with
less space than a constant impedance combiner. One manifold
spine will generally handle the peak voltages created when
combining multiple IBOC channels better than the hybrids required
for a CIF combiner. When channel assignments are known ahead
of time, a manifold is the logical approach.
Specifications
Model Number
Total Average Power
Frequency
DFCXX00XMX
140kW
87.5…108MHz
Combiner Type
MANIFOLD
Channel Spacing
>=1.2MHz 1
Insertion Loss
F02
<=0.35dB4)
VSWR
<=1.08
Group Delay Variation
Number of Cavities
Cavity Size
Isolation between Inputs
Output Connector
Average Power per Input
Material
Channel Spacing
Dependent
4 (OR 3) 3
14" (OR 24")
>=35dB
4-1/16" FLG/6-1/8" FLG
Channel Spacing
Dependent
AL+Cu Resonators +INVAR Roads
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C)
Dimensions (LxWxH)
Contact Factory
Weight (lbs.)
Contact Factory
Altitude
1
Application
5,000FT (1,524m)
FM/FM-HD
Notes
1) 2)
3) 4)
5) 6) For less than 1.2MHz, please contact the factory
F0 - Center Frequency
Depends of the channel spacing
For more than 5,000 feet (1,524m), please consult the factory
Optional blowers may be required for higher power
Varying with the cavity size and number of cavities per channel
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
59
FM Constant Impedance Filter/Combiner
Medium Power
• For Indoor Applications
• High Isolation
• Temperature Compensated
• FM and FM-HD Channel Bandwidths Compliance
• Modular Design
Specifications
Model Number
Frequency
DFC14003CIF
DFC14004CIF
DFC14005CIF
87.5…108MHz
87.5…108MHz
87.5…108MHz
Constant Impedance Filter
Constant Impedance Filter
Constant Impedance Filter
>=2.0MHz
>=1.2MHz
>=0.8MHz
40kW
30kW
24kW
Average Power with Blowers
50KW (per INPUT)
40KW (per INPUT)
34KW (per INPUT)
Temperature Compensated
YES
YES
YES
<=0.25dB
<=0.35dB
<=0.45dB
Combiner Type
Channel Spacing
Narrow Band Input
Average Power Handling
Insertion Loss
F02
VSWR
Group Delay Variation
Number of Cavities
<=1.06
<=1.06
<=1.06
<=50nS @+/-150Khz
<=70nS @+/-150Khz
<=160nS @+/-150Khz
3
4
5
Cavity Size
14"
14"
14"
Input Hybrid
EIA 3-1/8"
EIA 3-1/8"
EIA 3-1/8"
EIA1-5/8" OR EIA 3-1/8"
EIA1-5/8" OR EIA 3-1/8"
EIA1-5/8" OR EIA 3-1/8"
Input Connector
Wide Band Input
Insertion Loss
Group Delay Variation4
VSWR
<=0.1dB
<=0.15dB
<=0.2dB
<=20nS @+/-150Khz
<=30nS @+/-150Khz
<=200nS @+/-150Khz
<=1.07
<=1.07
<=1.07
EIA 3-1/8" OR 4-1/16"FLG
EIA 3-1/8" OR 4-1/16"FLG
EIA 3-1/8" OR 4-1/16"FLG
NB to WB
>=35dB
>=35dB
>=35dB
WB to NB
>=50dB
>=55dB
>=55dB
70kW
70kW
70kW
Input Connector
Isolation
Maximum Output Power
Handling
Ouput Hybrid
4-1/16" FLG
4-1/16" FLG
4-1/16" FLG
EIA 3-1/8" OR 4-1/16"FLG
EIA 3-1/8" OR 4-1/16"FLG
EIA 3-1/8" OR 4-1/16"FLG
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
Dimensions (LxWxH)
65"x43"x63"
(1.651mm x 1.092mm
x 1.600mm)
84"x43"x63"
(2.124mm x 1.092mm x
1.600mm)
104"x43"x63"
(2.642mm x 1.092mm
x 1.600mm)
Output Connector
Material
Weight3
1120Lbs
1445lb (Kg)
1766Lbs
Altitude1
5,000FT (1,524m)
5,000FT (1,524m)
5,000FT (1,524m)
FM/FM-HD
FM/FM-HD
FM/FM-HD
Application
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
Notes
1) For more than 5,000 feet
(1,524m), please consult
the factory 2) F0 - Center Frequency
3)Estimated
4)Wide band group delay is
added to narrow band delay
of upstream filter
60
FM Constant Impedance Filter/Combiner
High Power
• For Indoor Applications
• High Isolation
• Temperature Compensated
• FM and FM-HD Channel Bandwidths Compliance
• Modular Design
Specifications
Model Number
Frequency
DFC24003CIF
DFC24004CIF
DFC24005CIF
87.5…108MHz
87.5…108MHz
87.5…108MHz
Constant Impedance Filter
Constant Impedance Filter
Constant Impedance Filter
>=2.0MHz
>=1.2MHz
>=0.8MHz
56kW
46kW
40kW
Average Power with Blowers
70KW (per INPUT)
66KW (per INPUT)
60KW (per INPUT)
Temperature Compensated
YES
YES
YES
<=0.15dB
<=0.25dB
<=0.35dB
Combiner Type
Channel Spacing
Narrow Band Input
Average Power Handling
Insertion Loss
F01
VSWR
Group Delay Variation
Number of Cavities
<=1.06
<=1.06
<=1.06
<=50nS @+/-150Khz
<=70nS @+/-150Khz
<=160nS @+/-150Khz
3
4
5
Cavity Size
24"
24"
24"
Input Hybrid
4-1/16" FLG
4-1/16" FLG
4-1/16" FLG
EIA 3-1/8" OR 4-1/16"FLG
EIA 3-1/8" OR 4-1/16"FLG
EIA 3-1/8" OR 4-1/16"FLG
Input Connector
Wide Band Input
Insertion Loss
Group Delay Variation2
VSWR
<=0.1dB
<=0.15dB
<=0.2dB
<=20nS @+/-150Khz
<=30nS @+/-150Khz
<=200nS @+/-150Khz
<=1.07
<=1.07
<=1.07
4-1/16" FLG OR EIA 6-1/8"
4-1/16" FLG OR EIA 6-1/8"
4-1/16" FLG OR EIA 6-1/8"
NB to WB
>=35dB
>=35dB
>=35dB
WB to NB
>=50dB
>=55dB
>=55dB
Maximum Output Power
Handling
120kW
120kW
120kW
Input Connector
Isolation
Ouput Hybrid
EIA 6-1/8"
EIA 6-1/8"
EIA 6-1/8"
4-1/16" FLG OR EIA 6-1/8"
4-1/16" FLG OR EIA 6-1/8"
4-1/16" FLG OR EIA 6-1/8"
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
Dimensions (LxWxH)
107"x58"x66"
(2.667mm x 1.473mm
x 1.676mm)
133"x58"x66"
(3.378mm x 1.473mm
x 1.676mm)
158"x58"x66"
(4.013mm x 1.473mm
x 1.676mm)
Output Connector
Material
Weight3
1265Lbs
1630Lbs
1990Lbs
Altitude4
5,000FT (1,524m)
5,000FT (1,524m)
5,000FT (1,524m)
FM/FM-HD
FM/FM-HD
FM/FM-HD
Application
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
Notes
1) F0 - Center Frequency
2)Wide band group delay is
added to narrow band delay
of upstream modules
3)Estimated
4) For more than 5,000 feet
(1,524m), please consult
the factory
61
FM Constant Impedance Filter/Combiner
Very High Power
• For Indoor Applications
• High Isolation
• Temperature Compensated
• FM and FM-HD Channel Bandwidths Compliance
• Modular Design
Specifications
Model Number
Frequency
DFC24003CIF-H
DFC24004CIF-H
DFC24005CIF-H
87.5…108MHz
87.5…108MHz
87.5…108MHz
Constant Impedance Filter
Constant Impedance Filter
Constant Impedance Filter
>=2.0MHz
>=1.2MHz
>=0.8MHz
56kW
46kW
40kW
Average Power with Blowers
P>=70KW (per INPUT)
P>=66KW (per INPUT)
P>=60KW (per INPUT)
Temperature Compensated
YES
YES
YES
<=0.15dB
<=0.25dB
<=0.35dB
Combiner Type
Channel Spacing
Narrow Band Input
Average Power Handling
Insertion Loss
F01
VSWR
Group Delay Variation
Number of Cavities
<=1.06
<=1.06
<=1.06
<=50nS @+/-150Khz
<=70nS @+/-150Khz
<=160nS @+/-150Khz
3
4
5
Cavity Size
24"
24"
24"
Input Hybrid
EIA 6-1/8"
EIA 6-1/8"
EIA 6-1/8"
4-1/16" FLG OR EIA 6-1/8"
4-1/16" FLG OR EIA 6-1/8"
4-1/16" FLG OR EIA 6-1/8"
Input Connector
Wide Band Input
Insertion Loss
Group Delay Variation2
VSWR
<=0.1dB
<=0.15dB
<=0.2dB
<=20nS @+/-150Khz
<=30nS @+/-150Khz
<=200nS @+/-150Khz
<=1.07
<=1.07
<=1.07
EIA 6-1/8" OR EIA 9-3/16"
EIA 6-1/8" OR EIA 9-3/16"
EIA 6-1/8" OR EIA 9-3/16"
NB to WB
>=35dB
>=35dB
>=35dB
WB to NB
>=50dB
>=55dB
>=55dB
Maximum Output Power
Handling
250kW
250kW
250kW
Input Connector
Isolation
Ouput Hybrid
EIA 9-3/16"
EIA 9-3/16"
EIA 9-3/16"
EIA 6-1/8" OR EIA 9-3/16"
EIA 6-1/8" OR EIA 9-3/16"
EIA 6-1/8" OR EIA 9-3/16"
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
AL+Cu Resonators
+INVAR Roads
Ambient Temperature
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
32˚F(0˚C) to 104˚F(+40˚C)
Storage Temperature
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
32˚F(0˚C) to 122˚F(+50˚C)
Dimensions (LxWxH)
112"x58"x70"
(2.845mm x 1.473mm
x 1.778mm)
138"x58"x70"
(3.505mm x 1.473mm
x 1.778mm)
163"x58"x70"
(4.140mm x 1.473mm
x 1.778mm)
Output Connector
Material
Weight3
1295Lbs
1660Lbs
2020Lbs
Altitude4
5,000FT (1,524m)
5,000FT (1,524m)
5,000FT (1,524m)
FM/FM-HD
FM/FM-HD
FM/FM-HD
Application
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
Notes
1) F0 - Center Frequency
2)Wide band group delay is
added to narrow band delay
of upstream modules
3)Estimated
4) For more than 5,000 feet
(1,524m), please consult
the factory
62
HD Radio High Level Analog-Digital Combiner/Injector
Dielectric's High Level HD Radio Combiner/Injector provides another degree of
freedom to the broadcaster. It allows a digital signal to be added to an existing
run of line, without the addition of a new feed line or antenna. The units were
designed with ease of installation in mind. Simply install the unit in place of a
straight section of transmission line in the transmitter room. The aluminum construction is such that the weight of the unit is comparable to that of the line section it replaces.
Specifications
Frequency Range: 88 - 108 MHz
Impedance:
50 ohms
I/O Ports:
EIA flanged
VSWR: 1.05:1 or better when terminated in a
matched load
Insertion Loss: <0.1 dB
Isolation: >45 dB
Group Delay Variation:
<10 nS over any 400 kHz band
Mounting:
Any Position
Finish:
Black Paint
Catalog No:
DC-HDR- () -Size from Chart () -Type chart
Example:DCR-HDR-A-1
1 5/8" Combiner with 10 dB coupling
Size
Analog Port
Max. Total Power
Type
Coupling Factor
ABCD
1 5/8"
3 1/8"
4 1/16"
6 1/8"
12
40
50
70
1234
10 dB
9 dB
8 dB
Custom
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
63
RF Scout XLT Monitor
• Enhanced Local User Interface
• Transmission system monitor for VSWR, pressure and over-powering
• Forward and reverse remote power sensors measure power at directional couplers
The Dielectric RF Scout XLT monitors RF transmission system VSWR and forward power and is designed to aid in detecting VSWR problems as they develop. In many cases this will allow the transmitter operator to detect and remedy
transmission system contributors to elevated VSWR before they affect operations. The unit continuously monitors forward and reflected power. The system
displays the values and can hold up to a years worth of data and alarm events.
In addition, the system can also be configured to monitor transmission line
pressure and temperature. User settable options include warning and alarm
levels, enable / disable interlock trip for each monitoring function and a VSWR
alarm strike-out number.
The RF Scout XLT monitoring and communications capabilities offer a high
degree of flexibility. The unit’s status is available to local operators via a 3"
touch panel. In addition, the data is available to remote operators through an
Ethernet interface with FTP, HTTP (web page).
User PCs may communicate using Java WEB Applet.
The RF Scout monitoring system is comprised of a rack mountable unit with
two power sensors and their associated 25’ cables along with a dual directional coupler with factory pre-set coupling values consistent with the forward
power level. The coupler sections are designed for the various line sizes available. The RF Scout may also be supplied without the coupling section for systems which already have the appropriate couplers in place. Pressure transducers and thermocouples can be supplied separately.
Specifications
Processor:
Embedded PLC Controller
Display:
3" Multi-colored,
Back lit Touch Panel (Green,
Red, Orange)
Display Functions:
VSWR Value
Forward Power
Reflective Power
Line Pressure
Temperature
User Set-Up Menu for
all options/parameters
Sensor Inputs:
(2) 0 to 5 VDC for RF Power
(1) 0 to 5 VDC for Pressure
(1) Resistive Thermal Detector
RF Sensors-standard: Dielectric P/N 97730,
50 to 800 MHz,
True Average Power, 50 Ohm,
Type N, 1.0 W Max.
RF Sensors-low power: Dielectric P/N 11000005351,
50 to 800 MHz,
True Average Power, 50 Ohm,
Type N, 100 mW Max.
Transmitter Interlock:
Remote Interface
Functions:
Output (24 VDC)
Input (24 VDC)
SPDT; Dry contacts, Latching Relay
(250VAC, 2.5amps)
TX Interlock trip
VSWR Alarm
Forward Power Alarm
Pressure Alarm
Interlock Reset
Lan Port:
10/100 base T Ethernet,
FTP Server, Web
Power:
100-240 VAC, 60/50 Hz
Dimensions, in(cm):
2 Rack Unit,
19"(48.2)W x 8"(20.3)D x 13.5"(34.3)H
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
64
Accessories
Transmission Line
• High Conductivity Copper
• Low Loss PTFE Dielectric
• Welded Construction
• Heavy Wall Tubing
• Expansion Compensation
Dielectric is the world’s largest manufacturer of Rigid Coaxial Transmission
Line. Our record of reliable service and superior quality, as well as our ongoing
research and development programs have kept Dielectric the industry’s leader.
More Radio and TV stations, utilizing rigid Coaxial transmission line, are on the
air with Dielectric.
Standard offerings include:
• 1-5/8" to 9-3/16"
• EIA, digiTLine® (broadband), EHTLine (enhanced heat transfer), and
Ultimate Line.
Coaxial Patch Panels
• High Isolation
• 3, 4 or 7 Port Standard
• Low VSWR
• Custom Types Available
• Sizes 1-5/8" Through 9-3/16"
Dielectric patch panels are a low cost reliable solution to multi-connection routing situations. Patch panels are available in sizes of 1-5/8" through 6-1/8"
with 3, 4 or 7 ports and 8-3/16" (and larger) in 3 or 4 ports. Patch panels are
available with or without interlocks. Bolt type (EIA) flanges are standard.
Transitions to “no flange” or other line sizes are available. Dielectric can supply
panels in custom configurations for special requirements.
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
65
Motorized Switches
60000 Series
The 60000 Series Motorized Switches are blade type SPDT or
4 port transfer switches. Sizes include 7/8", 1-5/8", 3-1/8", 4-1/16", and
6-1/8". Switch position is indicated by a mechanical pointer and through auxiliary switches used for readout and interlocking circuits. In the closing mode,
the interlock switches do not activate until the RF contacts are ready to accept
full power. In the opening mode, the interlock switches open prior to the RF
contacts to prevent the breaking of the RF contacts while under power. Manual
operation is provided for by a knob. Terminations are standard EIA fixed flanges
with non-removable male connectors.
• Additional sizes available upon request.
Control Systems for
Motorized Switches
Remote/Local
Dual Universal Switch Controller
Dielectric's Dual Universal Switch Controller (P/N 11000010590) allows control
of one or two switches in either local or remote operation.
Optional control cable for 50000 Series Switch: 25'(7.5m) (P/N 11000007364)
Optional control cable for 60000 Series Switch: 25'(7.5m) (P/N 0101873025)
Optional control cable for 60000 Series Switch: 50'(15m) (P/N 0101873050)
Lockout/Tagout Switch
The RF “LOCKOUT/TAGOUT” Safety Switch prevents the accidental exposure
of workers to RF energy. It acts as an isolation device preventing the flow of
RF energy to the transmission line and antenna system. This unit helps stations
to comply with OSHA Rule 1910.147 regarding the general protection of
workers.
Specifications
Isolation
Insertion Loss (in disengaged mode)
Characteristic Impedance
Power Rating
RF Connections
Frequency Range
VSWR (in disengaged mode)
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
> 50 dB
< 0.03 dB @ 100 MHz
50 or 75 ohms
equal to specific line size
7/8" to 6-1/8" EIA flanged
300 kHz to 1 GHz
< 1.05:1
66
Air Dryers for Transmission Lines
Dielectric's automatic, self-contained compressor dehydrators, Models 200,
600, 850 and 1200 provide a dry air source for a variety of small volume applications. These compact units are the ideal choice for low volume dry air requirements. Each of these models is available in four alarm/output pressure configurations and in 115V/60-50 Hz or 220V/60-50 Hz to provide optimum capabilities for all applications.
Unit Capabilities
Line Size
Model
1-5/8"
ft (m)
3-1/8"
ft (m)
4-1/16"
ft (m)
5000 (1525)
1650 (1500)
850 (260)
5000 (1525)
3000 (915)
6-1/8"
ft (m)
• Adjustable system pressure allows
for altitude compensation to
assure peak efficiency at any elevation
TLS 300
• Self-regenerating twin tower drying system for years of trouble
free operation.
600C
3500 (1070)
2100 (640)
900 (275)
850C
5000 (1525)
3000 (915)
1500 (460)
TLS 1000
200C
5000 (1525)
Dielectric • 22 Tower Rd., Raymond, ME 04071 USA • +1 207-655-8100 • www.dielectric.com • FM 01/2017
1500 (460)
850 (260)
67
Global Presence
Dielectric products are represented in 90 countries around the world. With the
rapid expansion of communications, Dielectric is positioned to service the
broadcast needs of small and large stations, DTV and NTSC, FM and specialty
RF systems, complete systems and components.
Abu Dhabi
Angola
Argentina
Australia
Austria
Belgium
Belize
Benin
Botswana
Brazil
Canada
Chad
Chile
China
Colombia
Costa Rica
Denmark
Dominican Republic
Ecuador
Egypt
Elbonia
El Salvador
England
Ethiopia
Finland
France
Germany
Ghana
Greece
Greenland
Guam
Guatemala
Hong Kong
Iceland
India
Indonesia
Ireland
Israel
Italy
Japan
Jordan
Korea
Kuwait
Lebanon
Liberia
Madagascar
Malaysia
Mali
Malta
Mauritania
Mauritius
Mexico
Mongolia
Morocco
Nepal
Netherlands
New Zealand
Nicaragua
Nigeria
Norway
Oman
Pakistan
Specifications subject to change without notice.
Papua New Guinea
Peru
Philippines
Poland
Portugal
Puerto Rico
Qatar
Romania
Russia
Saipan
Sao Tome
Saudi Arabia
Singapore
South Africa
Spain
Sri Lanka
Sweden
Switzerland
Syria
Taiwan
Thailand
Togo
Trinidad
Uganda
United States
Venezuela
Vietnam
Yemen
Zambia
Zimbabwe
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