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“Ground Effect” in antenna caused by ________

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“Ground Effect” in antenna caused by ________

(a) faulty connection of the feed cable ground

(b) fading

(c) buildings and other structures on ground

(d) radio signals reflecting off the ground

The question was posed to me in an interview.

My query is from Time Division Multiplexing topic in portion Multiplexing & Sampling of Bandpass Signal of Analog Communications

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Right answer is (d) radio signals reflecting off the ground

For explanation: Radio signals that are reflecting back from the ground is responsible for ground effects in antenna.

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