CPI SAT Series 3122 1.2M Tx/Rx Ka-Band Antenna
Receive Only and TX/RX for linear and circular polarization from 27.00-31.00 GHz
3122 1.2M Ka-Band VSAT Antenna
The CPI SAT (formerly General Dynamics SATCOM Technologies) 3122 1.2M Ka-Band Antennas feature high gain for circular and Ka-Band linear polarization transmit and receive system applications.
Model Numbers
3122-990 w/0800-4925 Linear Cross POL Receive Only
3122-990 w/0800-4328 Circular RX-Only
3122-990 w/0800-4661 TX/RX Linear Cross-POL
3122-990 w/ 0800-4662 Circular Tx/Rx
3122-990 w/0800-4680 Dual-Linear Receive-Only
3122-990 w/0800-4694 Dual-Circular RX-Only
CPI SAT products encompass the design, development, and manufacture of microwave and satellite communication VSAT antennas for domestic and international applications. CPI Satcom and Antenna Technologies specializes in providing high quality, cost-effective antennas for both the two-way Very Small Aperture Terminal (VSAT) marketplace and receive-only applications. Additional products include unique special purpose antennas for such customers as NASA and defense contractors.
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Electrical |
Ka-Band - Circular |
Ka-Band - Circular |
Ka-Band - Linear |
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Antenna Size |
1.2 M |
1.2 M |
1.2 M |
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Operating Frequency (GHz) |
Receive Transmit |
20.20 - 21.20 GHz 30.00 - 31.00 GHz |
18.30 - 21.20 GHz 29.20 - 31.00 GHz |
18.70 - 21.20 GHz 27.00 - 31.00 GHz |
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Midband (± 0.5dB) |
Receive Transmit |
46.30 dBi 49.50 dBi |
45.80 dBi 49.40 dBi |
46.10 dBi 49.20 dBi |
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VSWR |
1.25:1 max |
1.3:1 max |
Rx: 1.5:1 max Tx: 1.3:1 max |
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Pattern Beamwidth (in degrees at midband) |
-3 dB -15 dB |
Rx: 0.83° Tx: 0.56° Rx: 1.86° Tx: 1.26° |
Rx: 0.85° Tx: 0.57° Rx: 1.90° Tx: 1.28° |
Rx: 0.84° Tx: 0.54° Rx: 1.88° Tx: 1.30° |
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Sidelobe Envelope, Co-Pol (dBi) |
29 - 25 Logq dBi |
29 - 25 Logq dBi |
29 - 25 Logq dBi |
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100l / D < q ≤ 20° |
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20° < q ≤ 26.3° |
-3.5 dBi |
-3.5 dBi |
-3.5 dBi |
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26.3° < q ≤ 48° |
32 - 25 Logq dBi |
32 - 25 Logq dBi |
32 - 25 Logq dBi |
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q > 48° |
-10 dBi (averaged) |
-10 dBi (averaged) |
-10 dBi (averaged) |
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Antenna Noise Temperature |
178 K |
178 K |
181 K |
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5° Elevation |
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10° Elevation |
137 K |
137 K |
140 K |
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20° Elevation |
107 K |
107 K |
110 K |
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40° Elevation |
89 K |
89 K |
92 K |
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Power Handling |
100 W |
100 W |
100 W |
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Cross Polarization Isolation On Axis Within 1.0 dB Beamwidth |
17.70 dB 17.70 dB |
Rx: 17.70 dB Tx: 21.30 dB Rx: 17.70 dB Tx: 21.30 dB |
Rx: 30.00 dB Tx: 35.00 dB 26.00 dB |
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Output Waveguide Interface Flange |
Rx: WR42 Tx: WR28 |
Rx: WR42 Tx: WR28 |
RRx: WR42 Tx: WR28 |
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Maximum Feed Support Weight |
8 lbs. (3.5 kg.) |
8 lbs. (3.5 kg.) |
8 lbs. (3.5 kg.) |
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Mechanical |
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Reflector Material |
Glass Fiber Reinforced Polyester SMC, Ka-Band Formulation |
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Antenna Optics |
1-piece Offset, Prime Focus |
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Mast Pipe Size |
2.5” SCH 40 Pipe (2.88” OD) 73.2 mm |
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Elevation Adjustment Range |
5°to 90°, Continuous Fine Adjustment |
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Azimuth Adjustment Range |
± 10°Fine Adjustment, 360°Continuous |
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Shipping Specifications |
80 lbs. (36 kg.) |
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Environmental Performance |
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Wind Loading |
Operational Survival |
45 mph (72 km/h) *0.5 dB Loss @ 14.25 125 mph (201 km/h) |
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Temperature (operational) |
- 40°to 140°F (- 40°to 60°C) |
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Rain (operational) |
½” / hr |
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Ice (operational) |
--------------------------------- |
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Atmospheric Conditions |
Salt, Pollutants and Contaminants as Encountered in Coastal and Industrial Areas |
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Solar Radiation |
360 BTU/h/ft2 |
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Circular and Linear Ka-Band Transmit and Receive, Receive Only
