The Comant CI 105-3 DME / Transponder Antenna is an externally mounted L-band antenna designed to support aircraft distance measuring equipment (DME) and transponder systems. It provides the same operating characteristics as the Comant CI 105, with the addition of a three-hole flange mounting configuration frequently used on turboprop and jet aircraft.
The antenna supports the standard DME and transponder frequency ranges, covering 960–1220 MHz for DME operation and 1030–1090 MHz for transponder and Mode S applications. It is equipped with a BNC connector and 50-ohm impedance, ensuring compatibility with standard aircraft RF cabling and avionics equipment.
Encased in a glass-reinforced polyester molded shell, the CI 105-3 is designed for durability in demanding aircraft environments. It is rated for operation at true airspeeds up to 400 knots at 25,000 feet. When installed in accordance with applicable aircraft approval data and Comant installation instructions, it provides reliable RF performance for certified aircraft installations.
Key Features
- L-band antenna for DME and transponder systems
- Frequency coverage from 960–1220 MHz and 1030–1090 MHz
- Three-hole flange for external aircraft mounting
- Encased in a glass-reinforced polyester molded shell
- BNC connector with 50-ohm impedance
- Vertical polarization
- Approved for aircraft operation up to 400 knots TAS at 25,000 ft
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