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GD Satcom 1241 2.4M C-Band Circular Tx/Rx (1.3 VAR) WR-137 Antenna System

GD Satcom 1241 2.4M C-Band Circular Tx/Rx (1.3 VAR) WR-137 Antenna System

GD Satcom is the world’s largest manufacturer of Rx/Tx VSAT antennas. We have the broadest product line in the industry including Receive Only, Rx/Tx and Rural Telephony antenna systems. GD Satcom offers nineteen antenna sizes, 47cm to 4.5M. GD Satcom is the leader in obtaining type certifications and approvals for Intelsat, AsiaSat and Eutelsat. GD Satcom antennas provide the best quality in the market due to the sophisticated, precision SMC compression molding process technology. GD Satcom provides the best value antenna solution to the market with competitive prices, the highest quality products and superb engineering support.


  • Precision Compression molded offset reflector
  • Non-penetrating roof mounts and king posts available
  • Interface kits for all C & Ku-Band RF heads in stock
  • Reflector/Feed electrical anti-icing available

C-Band Circular Feed

Antenna Size2.4M (96 in.)
Operating Frequency (GHz)

5.85 – 6.425 GHz
3.625 – 4.20 GHz
Antenna Gain at Midband, dBi (± .2dB)

42.20 dBi
38.20 dBi
VSWR1.3:1 Max
Pattern Beamwidth (in degrees at midband)
    -3 dB
    -15 dB

Rx: 2.20°, Tx: 1.40°
Rx: 4.90°, Tx: 3.10°
Sidelobe Envelope, Co-Pol (dBi)
    100λ / D < θ ≤ 20°
    20° < θ ≤ 26.3°
    26.3° < θ ≤ 48°
    θ > 48°

29 – 25 Logθ dBi
-3.5 dBi
32 – 25 Logθ dBi
-10 dBi (averaged)
Antenna Noise Temperature
    10° Elevation
    20° Elevation
    30° Elevation
    40° Elevation

57 K
49 K
45 K
45 K
Axial Ratio (Circular)

2.28 dB
1.94 dB
Feed Interface

CPR 137 
CPR 229F
Maximum Radio Weight20 Lbs. (9 Kg.)
(Optional Feed Stabilizer available for higher radio weight)
Reflector MaterialGlass Fiber Reinforced Polyester SMC
Antenna OpticsPrime Focus, Offset Feed, Four-piece
Mast Pipe Size6” SCH 40 Pipe (6.63” OD) 16.83 cm.
Elevation Adjustment Range5°to 90°Continuous Fine Adjustment
Azimuth Adjustment Range360°Continuous, +/- 10°Fine Adjustment
Mount TypeElevation over Azimuth
Shipping Weight (Total)545 lbs. (248 kg.)
Install (Net) Weight365 lbs. (166 kg.)
Environmental Performance
Wind Loading

50 mph (80 km/h)
125 mph (201 km/h)
Temperature Range (operational)-40°to 140°F (-40°to 60°C)
Rain (operational)1/2” (13mm) / hr
Atmospheric ConditionsSalt, Pollutants and Contaminants as Encountered in Coastal and Industrial Areas
Relative Humidity0 to 100% With Condensation
Solar Radiation360 BTU/h/ft²

General Dynamics SATCOM Technologies 1241 Datasheet
General Dynamics SATCOM Technologies 1241 Geometry
General Dynamics SATCOM Technologies 1241 Type Approvals
General Dynamics SATCOM Technologies 1241 2.4M 4 Piece C-Band Tx/Rx Antenna Feed System
General Dynamics SATCOM Technologies 1241 Manual

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