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Antenna efficiency of a lossless isotropic antenna is dB is ____

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Antenna efficiency of a lossless isotropic antenna is dB is ____

(a) 0

(b) 1

(c) 3

(d) -3

The question was asked by my school teacher while I was bunking the class.

Question is taken from Measurement of Gain topic in chapter Modern Antennas & Antenna Measurements of Antennas

1 Answer

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Best answer
Correct choice is (a) 0

Best explanation: For a lossless antenna the whole peak power is radiated towards the receiver without any losses. So the antenna efficiency will be 100% so it is 0dB.

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