Relation between directivity and effective area of transmitting and receiving antenna is ________(a) Dt At=Dr Ar(b) Dt Ar=Dr At(c) At Dt=∈Dr Ar(d) Dt At=∈Dr ArThis question was addressed to me in an online interview.This key question is from Basics topic in chapter Antenna Parameters of Antennas

Relation between directivity and effective area of transmitting and re

1.	Relation between directivity and effective area of transmitting and receiving antenna is ________(a) Dt At=Dr Ar(b) Dt Ar=Dr At(c) At Dt=∈Dr Ar(d) Dt At=∈Dr ArThis question was addressed to me in an online interview.This key question is from Basics topic in chapter Antenna Parameters of Antennas
Answer» RIGHT option is (b) Dt Ar=Dr At Easiest EXPLANATION: The power collected by the receiving antenna is \(P_r = \frac{P_tD_tA_r}{4\pi R^2} => D_tA_r = \frac{P_r}{P_t}4\pi R^2\) = Dr At ∴ Dt Ar=Dr At

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