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What is the maximum power gain of antenna with radiation efficiency 98% and directive gain 1?

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What is the maximum power gain of antenna with radiation efficiency 98% and directive gain 1?

(a) 0.98

(b) 1.02

(c) 1.98

(d) 1

The question was posed to me during an internship interview.

This intriguing question originated from Power Gain in chapter Antenna Parameters of Antennas

1 Answer

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Best answer
Correct choice is (a) 0.98

Explanation: Gpmax=ηr Gdmax where ηr is radiation efficiency

∴ Gpmax=0.98×1=0.98.

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