Model 4.8m Cassegrain Antenna

Model 4.8m Cassegrain Antenna
Model 4.8m Cassegrain Antenna
Satcom Antennas
Description
The General Dynamics SATCOM Technologies 4.8-meter
antenna delivers exceptional performance for transmit/
receive and receive-only applications for C through Ku-band
frequencies. This antenna offers a deep dish reflector that
incorporates precision-formed panels, contoured radials and
hub assembly. It features an innovative feed and subreflector
design which results in high gain, low noise temperature,
high antenna efficiency and excellent rejection of noise
and microwave interference. The aluminum reflector is
supported by a galvanized pedestal that provides the required
stiffness for pointing and tracking accuracy. The pedestals
are designed for full orbital arc coverage and are readily
adaptable to ground or rooftop installations. The electrical
performance is compliant with ITU and FCC sidelobe
specifications. Type approved configurations are available for
Intelsat (F1, E2), Eutelsat (L), Asiasat, Hispasat, EuropeStar
or Singapore Telecom. All configurations meet SATCOM
Technologies’ own type-approved quality assurance and
performance guarantee.
Options
„„ C, X, Ku and DBS-band feed configurations
„„ C/Ku receive-only feed systems
„„ Specialized feed systems (e.g. extended, multi-band)
„„ Improved feed cross-pol performance
„„ Fixed or motorizable pedestal mounts
The Strength to Perform
‘Type-Approved,’ bolt-together
3.4 to 18.4 GHz operation, meeting ITU and FCC
„„ Antenna control system with tracking
„„ Reflector and feed deicing systems
„„ Environmental hub configurations
„„ Integrated transmit cross-axis kits
„„ Integrated LNA or LNB systems
„„ HPAs, converters and M&C systems
Aluminum reflector, galvanized pedestal
„„ Load frame or non-penetrating mounts
„„ Packing for sea and air transport
125 mph (200 km/h) wind survival
High-wind option
„„ Turnkey installation and testing
Upgrades
„„ X-band low PIM reflector/feed configurations
„„ Extended azimuth travel
„„ High wind configuration
„„ Low operating temperatures
„„ High power configurations
„„ For Ka-band see separate datasheet
Model 4.8m Cassegrain Antenna
Technical Specifications
Electrical (1)
Frequency (GHz)
Antenna Gain, Midband (dBi) (2)
VSWR
Pattern Beamwidth (2)
-3 dB, at midband
Antenna Noise Temperature (K)
5° Elevation
10° Elevation
20° Elevation
40° Elevation
Typical G/T (dB/K) (3)
Axial Ratio (dB)
Power Handling (total)
Cross Polarization Isolation (dB)
On Axis
Within 1.0 dB beamwidth
Port to Port Isolation (dB)
Rx/Tx (Rx frequency)
Tx/Rx (Tx frequency)
Sidelobe Performance
RF Specification
C-Band 2-Port
Circular Polarized
Receive
Transmit
3.625 5.850 4.200
6.425
44.16
48.10
1.55:1
1.30:1
1.04°
0.67°
60
57
47
43
1.08°
0.69°
54
44
39
37
25.3
(4.000 GHz, 30 K LNA)
1.80
0.75
5 kW CW
19.7
19.7
C-Band 4-Port
Circular Polarized (4)
Receive
Transmit
3.625 5.850 4.200
6.425
44.00
47.90
1.25:1
1.25:1
27.3
27.3
0
-60
-100
0
ITU-RS-580
975-2635
0.55°
0.52°
Ku-Band 4-Port
Linear Polarized (4)
Receive
Transmit
10.950 13.750 12.750
14.500
53.50
55.20
1.30:1
1.30:1
0.34°
61
51
45
42
25.6
(4.000 GHz, 30 K LNA)
0.50
0.50
5 kW CW
30.8
30.8
X-Band 2-Port
Circular Polarized
Receive
Transmit
7.250 7.900 7.750
8.400
49.50
50.10
1.25:1
1.25:1
30.8
30.8
0
-85
-85
0
ITU-RS-580
975-4289
80
67
58
53
30.0
(7.500 GHz, 45 K LNA)
1.50
1.50
5 kW CW
21.3
21.3
0.28°
21.3
21.3
0
-110
-110
0
ITU-RS-580
975-2427
DBS-Band 4-Port
Linear Polarized
Receive
Transmit
10.700 17.300 12.750
18.400
53.10
56.90
1.30:1
1.30:1
0.36°
0.23°
73
59
50
44
32.4
(11.850 GHz, 70 K LNA)
32.3
(11.725 GHz, 70 K LNA)
2 kW CW
2 kW CW
35.0
35.0
35.0
35.0
0
-50
-85
0
ITU-RS-580, FCC
975-2114
35.0
35.0
35.0
30.0
0
-75
-85
0
ITU-RS-580, FCC
975-2446
(1) All values are at rear feed flange. (2) C-band Rx values are at 4 GHz. (3) Typical G/T at 20° elevation with clear horizon using single bolt-on LNA to feed.
(4) Also available in extended frequency bands.
Mechanical/Environmental (5)
Antenna Diameter
Antenna Type
Reflector Construction
Hub Dimensions
Mount Configuration
Drive Type
Azimuth Travel
Elevation Travel
Foundation (L x W x D)
Concrete
Reinforcing Steel
Shipping Containers
Operational Wind Loading
Survival Wind Loading
Any Position
At Zenith
Operational Temperature
Survival Temperature
Rain
Relative Humidity
Solar Radiation
Ice (survival)
Atmospheric Conditions
Shock and Vibration
Fixed Post Mount (PM) Pedestal
Motorizable Kingpost Pedestal (KP)
4.8 meters (15.83 feet)
Compact Cassegrain design
16 precision-formed aluminum panels with heat-diffusing white paint
Cleaned and brightened aluminum back-up structure
48 in (122 cm) OD, 29 in (74 cm) depth
Elevation over azimuth pedestal, constructed of galvanized A36 steel
Manual strut
Manual strut or jack screw
360° coarse, 40° fine adjustment
120° continuous
0 to 90° continuous
0 to 90° continuous
12.5 x 12.5 x 1.5 ft (3.8 x 3.8 x 0.38 m)
8.7 yds³ (6.65 m³)
1,125 lbs. (510 kg)
One 20 ft standard (4 units in one 40 ft)
One 20 ft standard (2 units in one 40 ft)
45 mph (72 km/h) gusting to 60 mph (97 km/h)
Motorizable High Wind Kingpost Pedestal (KP-HW)
Manual jack screws
120° continuous
0 to 90° continuous
16.5 x 16.5 x 2.5 ft (5.0 x 5.0 x 0.76 m)
25.5 yds³ (19.5 m³)
1,680 lbs. (762 kg)
Two units in one 40 ft standard
Up to 62 mph (100 km/h)
125 mph (200 km/h) @ 58° F (15° C)
180 mph (290 km/h) @ 58° F (15° C)
n/a
210 mph (338 km/h) @ 58° F (15° C)
+5° to +122° F (-15° to +50° C)
-22° to +140° F (-30° to +60° C), low temperature options available
Up to 4 in/h (10 cm/h)
0 to 100% with condensation
360 BTU/h/ft² (1,000 Kcal/h/m²)
1 in (2.5 cm) on all surfaces or 1/2 in (1.3 cm) on all surfaces with 80 mph (130 km/h) wind gusts
As encountered in coastal regions and/or heavily industrialized areas
As encountered during shipment by airplane, ship or truck
(5) Some specifications may vary based on the combination of equipment, options and/or upgrades ordered.
2600 N. Longview Street • Kilgore, TX 75662 USA • Tel: (903) 984-0555 • Fax: (903) 984-1826 • Email: kilgore-sales@gdsatcom.com
Website: www.gdsatcom.com
655-0034G, 2/12
© 2012 General Dynamics. All rights reserved. General Dynamics reserves the right to make changes in its products and specifications at anytime and without notice. All trademarks
indicated as such herein are trademarks of General Dynamics. All other product and service names are the property of their respective owners. ® Reg. U.S. Pat. and Tm. Off.
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