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Prateek Asked :

02-10-2021 Antennas

Q. Which of the following is mainly used in electronic scanning?

A. Phase shifters
B. Amplifiers
C. Repeaters
D. Limiters


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Dapzoi Verified
Commented on 2021-10-02 11:31:40 (IST)
Answer: A

Explanation: Electronic scanning is flexible and also requires low maintenance. Electronic scanning is composed of phase shifters, electrical circuits that steer the beam. For the beam to change its direction, the phase of the radiators has to be changed and so the phase shifters used.