411 terminated folded dipole antenna

411 terminated folded dipole antenna
411 TERMINATED FOLDED DIPOLE ANTENNA
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FEATURES AT A GLANCE
The Code 411 Terminated Folded Dipole Antenna is a
2-wire antenna designed for broadband operation in fixed
stations. Separate variations are available to support
power levels of 125 or 1000 W. The Code 411 Antenna can
be mounted horizontally between two support systems,
or as an inverted “V” using a single central support mast.
Flexible design
Easy to install
Up to 1000 W RF power rating
Rated for data
PERFORMANCE
The Code 411 Antenna provides excellent performance for short
to medium distance HF communications. It is offered in a range of
lengths to suit installation requirements. To optimise the antenna for
Near Vertical Incidence Skywave (NVIS) propagation use an inverted V
configuration or adjust the installed height above ground.
ANTENNA MODEL
The model of Code 411 Antenna should be selected to suit the
application depending on the required power rating and the
maximum amount of available space to install it. As a general rule the
radiation efficiency of the Code 411 Antenna increases with antenna
length so it is recommended to select the longest variant that will
suit available space.
EASY TO INSTALL
The Code 411 Antenna is supplied completely assembled and
ready for installation. Installation hardware includes 60 m of high
quality UV resistant rope and pulley as well as easy to understand
installation instructions. A range of coaxial cable lengths and types
are available but are ordered separately. Codan also has a large range
of mast options that are suitable for use with the Code 411 Antenna.
Reference Dipole
90°
0°
180° Azimuth
60°
m
43
m
60°
All Lengths
30°
Length (m)
Power (W)
15-00411-003
43
125
15-00411-004
34
125
15-00411-005
27
125
15-00411-012
43
1000
15-00411-011
34
1000
27
m
34
30°
Model
Notes:
2 to 4 MHz
0°
dB
0
–10
–20
–30
7 to 30 MHz
–30
–20
–10
0
Elevation at 0° Azimuth
12-20054 Issue 11 2/2013
www.codanradio.com
1. The 43 m antenna is 10 dB more efficient
from 2 to 4 MHz than the 27 m version.
2.
The
reference dipole is 1/4 wavelength
0°
above ground.
dB
3. Radiation patterns are for antenna
installation heights recommended in
the antenna mounting details.
© Copyright 2013
411 TERMINATED FOLDED DIPOLE ANTENNA
CODE 411 ANTENNA INSTALLATION
Horizontal Mounting
a
Support
mast
b
Note:
Antenna should be oriented at right
angles to the preferred direction of
propagation to maximise network
performance
Inverted ‘V’ Mounting
Antenna shown
anchored to stub
stakes
c
Stub
mast
d
Recommended
angle 22°
Central
support mast
e
MOUNTING & CONSTRUCTION
SPECIFICATIONS
Code 411 Antenna mounting details
Model
f
Dimensions (m)
a
b
c
d
e
f
15-00411-003/012
10
47
13
4.8
22
32
15-00411-004/011
8
38
11
4.2
18
27
15-00411-005
6.5
31
8
3
14.5
20
Note:
Dimension ‘b’ allows 2 metres between each
end of the antenna and the support mast.
Frequency range
2 to 30 MHz
Connector
UHF type socket
Input impedance
50 ohm
VSWR
Typically 2.5:1
Power rating
125 W PEP, 100 W CW
1000 W PEP, 600 W CW
ACCESSORIES
 30 m RG58 Coaxial Cable
 100 m low loss RG213 Coaxial Cable
 RG213 Strain Relief Hardware
 In-line Lightning Arrestor
 Spare waterproof UHF plug
CODAN™ is a trademark of Codan Limited.
Values noted are typical. Equipment descriptions and specifications subject to change without notice or obligation.
Other brand, product and company names mentioned
in this document are trademarks or registered
trademarks of their respective holders.
RADIO COMMUNICATIONS
T: +61 8 8305 0311
www.codanradio.com
Codan Limited
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12-20054 Issue 11 2/2013
F: +61 8 8305 0411
81 Graves Street
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E: sales@codanradio.com
Newton South Australia 5074
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Australia
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