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Which is the standard reference antenna for the directive gain?(a) Isotropic antenna(b) Marconi antenna(c) Helical antenna(d) Log Periodic antennaI got this question during an online interview.My question is from Asynchronous TDM in chapter Multiplexing & Sampling of Bandpass Signal of Analog Communications

Answer»

Correct answer is (a) Isotropic antenna

Explanation: Isotropic antenna is an ideal antenna that radiates its power UNIFORMLY in all DIRECTIONS. In practical, no isotropic antenna exists. It is often USED as a REFERENCE antenna for the antenna gain. Directive gain of a practical antenna is the ratio of the radiation intensity of the antenna to that of an isotropic antenna.



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