Electronics and Communication Engineering - Exam Questions Papers - Discussion

25. 

Power gain of antenna equals directive gain in VHF and UHF range if and only if efficiency of the antenna is __________ .

[A]. 0.25
[B]. 0.5
[C]. 0.75
[D]. 1

Answer: Option D

Explanation:

Directive gain and power gain are identical except that power gain takes into account the antenna losses. It may be written as

Gp = ηGd η => efficiency

If η = 1 , GP = Gd .


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