ADF Antenna is described as what type and frequency range?

ADF Antenna is described as what type and frequency range?

• A. A flush-mounted type antenna that receives signals in the 100 to 400 MHz range
• B. A tall whip antenna for the 1 to 10 GHz band
• C. A satellite dish antenna
• D. An external loop antenna for VHF only

Answer: (A)

An ADF antenna is described as flush-mounted because this design integrates into the aircraft’s skin, minimizing drag and avoiding protruding hardware while still providing reliable reception for its navigation function. The frequency range given in this context fits the ADF system’s operating window as presented in the material, allowing the antenna and receiver to be matched for effective directional sensing without adding external hardware. Other described options point to antennas used for different purposes—tall whips are typical for higher-frequency bands, satellite dishes serve satellite communications, and an external loop antenna for VHF would be a different type used in other navigation or comms setups—so they don’t align with the ADF description used in this question.

An ADF antenna is described as flush-mounted because this design integrates into the aircraft’s skin, minimizing drag and avoiding protruding hardware while still providing reliable reception for its navigation function. The frequency range given in this context fits the ADF system’s operating window as presented in the material, allowing the antenna and receiver to be matched for effective directional sensing without adding external hardware. Other described options point to antennas used for different purposes—tall whips are typical for higher-frequency bands, satellite dishes serve satellite communications, and an external loop antenna for VHF would be a different type used in other navigation or comms setups—so they don’t align with the ADF description used in this question.