M

Mr. Dubey • 52.33K Points
Coach 

Q. Antenna’s efficiency is given by the ratio of

(A) effective aperture to physical aperture
(B) physical aperture to effective aperture
(C) signal power to noise power
(D) losses

Explanation: 
 the larger the antenna aperture the larger is the resulting signal power density in the desired direction. the ratio of effective aperture to physical aperture is the antenna’s efficiency.

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