Which of the following is responsible for the reduced use of transmitter power in radar altimeter?(a) Low range(b) Interference with other bands(c) Receiver low noise amplifier(d) RadomeThe question was asked in class test.My question is taken from Radar Altimeter in section Celestial Navigation, Doppler and Altimeter Radars of Avionics

Which of the following is responsible for the reduced use of transmitt

1.	Which of the following is responsible for the reduced use of transmitter power in radar altimeter?(a) Low range(b) Interference with other bands(c) Receiver low noise amplifier(d) RadomeThe question was asked in class test.My question is taken from Radar Altimeter in section Celestial Navigation, Doppler and Altimeter Radars of Avionics
Answer» The CORRECT OPTION is (c) Receiver low noise AMPLIFIER To elaborate: The TRANSMITTER power depends on the SENSITIVITY of the receiver. The receiver low noise amplifier typically has a 2 to 3 dB noise figure, resulting in a sensitivity level that allows relatively low transmitter power.

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