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In which of the following a single radiator source is used to feed antenna with different phase shifts?

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In which of the following a single radiator source is used to feed antenna with different phase shifts?

(a) Phased array

(b) FMCW radar

(c) Monopulse radar

(d) CW radar

This question was posed to me in a job interview.

Origin of the question is Phased Array in portion Phased, Adaptive and Binomial Arrays of Antennas

1 Answer

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Best answer
Correct option is (a) Phased array

The best I can explain: In phased array radar a single radiator is used to feed antenna with different phase shifts and thus the desired beam width is obtained. The beam of phased array radar is a synthesis of the multiple antennas used at different phase shifts. In FMCW, Monopulse, CW radar multiple antennas are not usually used at different phase shifts.

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