GATE EC 2004 Electromagnetics Solution Q 3

GATE EC 2004 Electromagnetics Solution Q 3

A lossless transmission line is terminated in a load which reflects a part of the incident power. The measured VSWR is 2. The percentage of the power that is reflected back is_____.

(a) 57.73

(b) 33.33

(c) 0.11

(d) 11.11

Ans :- (d)

Explanation

s=\frac{1+\left|\Gamma\right|}{1-\left|\Gamma\right|} \left|\Gamma\right|=\frac13 \therefore\frac{P_{ref}}{P_{inc}}=\Gamma^2=\frac19

11.11% of P_i is reflected.

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