Question

The ability of the antenna to turn radiated energy into conducted energy is called ____________

(a) Return ratio

(b) Power ratio

(c) Capture area

(d) RCS

I had been asked this question in a job interview.

The above asked question is from Primary and Secondary Radar topic in division Surveillance Systems, Mapping and Multimode Radars of Avionics

Answer 1

The correct answer is (c) Capture area

The explanation is: The ability of the antenna to turn radiated energy into conducted energy is called a capture area. As an example, if a power density of mw/m2 illuminates an antenna with 1 m2 capture area, then the antenna provides 1 mw power at the output connector.