Cobham Comant CI-275 White UHF Radiotelephone BNC Connector Antenna
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Approvals and Conformities
Product Attributes

Wide band UHF antenna designed for high-performance aircraft over the full frequency range of 406-512 MHz. Low profile, blade-type antenna is encased in a low drag, low weight molded body to ensure high reliability. The CI 275 comes standard with BNC connector. Other connectors available. See order options chart.
MODEL CI 275 Series UHF Antenna | |
Electrical | |
Frequency | 406 to 512 MHz |
VSWR | 2.0:1 Maximum |
Polarization | Vertical |
Radiation Pattern | Equivalent of ? / 4 Stub |
Impedance | 50 Ohms |
Power Rating | 50 Watts Average |
Mechanical | |
Weight | 0.5 lb. Maximum |
Height | 3.5 In. Maximum |
Material | Lexan Housing |
Finish | Polyurethane Enamel |
Connector | BNC (female) |
Environmental | |
Temperature | -55ºC to +70ºC |
Altitude | 50,000 ft. |
Air Speed | 600 knots TAS @ 25,000 ft. |
Order Options | |
Connector | |
BNC | CI 275 |
TNC | CI 275-2 |
N | CI 275-5 |
Color | |
White | Standard |
Approvals and Conformities
Product Attributes

Wide band UHF antenna designed for high-performance aircraft over the full frequency range of 406-512 MHz. Low profile, blade-type antenna is encased in a low drag, low weight molded body to ensure high reliability. The CI 275 comes standard with BNC connector. Other connectors available. See order options chart.
MODEL CI 275 Series UHF Antenna | |
Electrical | |
Frequency | 406 to 512 MHz |
VSWR | 2.0:1 Maximum |
Polarization | Vertical |
Radiation Pattern | Equivalent of ? / 4 Stub |
Impedance | 50 Ohms |
Power Rating | 50 Watts Average |
Mechanical | |
Weight | 0.5 lb. Maximum |
Height | 3.5 In. Maximum |
Material | Lexan Housing |
Finish | Polyurethane Enamel |
Connector | BNC (female) |
Environmental | |
Temperature | -55ºC to +70ºC |
Altitude | 50,000 ft. |
Air Speed | 600 knots TAS @ 25,000 ft. |
Order Options | |
Connector | |
BNC | CI 275 |
TNC | CI 275-2 |
N | CI 275-5 |
Color | |
White | Standard |
Approvals and Conformities
Product Attributes

Wide band UHF antenna designed for high-performance aircraft over the full frequency range of 406-512 MHz. Low profile, blade-type antenna is encased in a low drag, low weight molded body to ensure high reliability. The CI 275 comes standard with BNC connector. Other connectors available. See order options chart.
MODEL CI 275 Series UHF Antenna | |
Electrical | |
Frequency | 406 to 512 MHz |
VSWR | 2.0:1 Maximum |
Polarization | Vertical |
Radiation Pattern | Equivalent of ? / 4 Stub |
Impedance | 50 Ohms |
Power Rating | 50 Watts Average |
Mechanical | |
Weight | 0.5 lb. Maximum |
Height | 3.5 In. Maximum |
Material | Lexan Housing |
Finish | Polyurethane Enamel |
Connector | BNC (female) |
Environmental | |
Temperature | -55ºC to +70ºC |
Altitude | 50,000 ft. |
Air Speed | 600 knots TAS @ 25,000 ft. |
Order Options | |
Connector | |
BNC | CI 275 |
TNC | CI 275-2 |
N | CI 275-5 |
Color | |
White | Standard |
Approvals and Conformities
Product Attributes

Wide band UHF antenna designed for high-performance aircraft over the full frequency range of 406-512 MHz. Low profile, blade-type antenna is encased in a low drag, low weight molded body to ensure high reliability. The CI 275 comes standard with BNC connector. Other connectors available. See order options chart.
MODEL CI 275 Series UHF Antenna | |
Electrical | |
Frequency | 406 to 512 MHz |
VSWR | 2.0:1 Maximum |
Polarization | Vertical |
Radiation Pattern | Equivalent of ? / 4 Stub |
Impedance | 50 Ohms |
Power Rating | 50 Watts Average |
Mechanical | |
Weight | 0.5 lb. Maximum |
Height | 3.5 In. Maximum |
Material | Lexan Housing |
Finish | Polyurethane Enamel |
Connector | BNC (female) |
Environmental | |
Temperature | -55ºC to +70ºC |
Altitude | 50,000 ft. |
Air Speed | 600 knots TAS @ 25,000 ft. |
Order Options | |
Connector | |
BNC | CI 275 |
TNC | CI 275-2 |
N | CI 275-5 |
Color | |
White | Standard |
Approvals and Conformities
Product Attributes

Wide band UHF antenna designed for high-performance aircraft over the full frequency range of 406-512 MHz. Low profile, blade-type antenna is encased in a low drag, low weight molded body to ensure high reliability. The CI 275 comes standard with BNC connector. Other connectors available. See order options chart.
MODEL CI 275 Series UHF Antenna | |
Electrical | |
Frequency | 406 to 512 MHz |
VSWR | 2.0:1 Maximum |
Polarization | Vertical |
Radiation Pattern | Equivalent of ? / 4 Stub |
Impedance | 50 Ohms |
Power Rating | 50 Watts Average |
Mechanical | |
Weight | 0.5 lb. Maximum |
Height | 3.5 In. Maximum |
Material | Lexan Housing |
Finish | Polyurethane Enamel |
Connector | BNC (female) |
Environmental | |
Temperature | -55ºC to +70ºC |
Altitude | 50,000 ft. |
Air Speed | 600 knots TAS @ 25,000 ft. |
Order Options | |
Connector | |
BNC | CI 275 |
TNC | CI 275-2 |
N | CI 275-5 |
Color | |
White | Standard |
Approvals and Conformities
Product Attributes

Wide band UHF antenna designed for high-performance aircraft over the full frequency range of 406-512 MHz. Low profile, blade-type antenna is encased in a low drag, low weight molded body to ensure high reliability. The CI 275 comes standard with BNC connector. Other connectors available. See order options chart.
MODEL CI 275 Series UHF Antenna | |
Electrical | |
Frequency | 406 to 512 MHz |
VSWR | 2.0:1 Maximum |
Polarization | Vertical |
Radiation Pattern | Equivalent of ? / 4 Stub |
Impedance | 50 Ohms |
Power Rating | 50 Watts Average |
Mechanical | |
Weight | 0.5 lb. Maximum |
Height | 3.5 In. Maximum |
Material | Lexan Housing |
Finish | Polyurethane Enamel |
Connector | BNC (female) |
Environmental | |
Temperature | -55ºC to +70ºC |
Altitude | 50,000 ft. |
Air Speed | 600 knots TAS @ 25,000 ft. |
Order Options | |
Connector | |
BNC | CI 275 |
TNC | CI 275-2 |
N | CI 275-5 |
Color | |
White | Standard |