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The smallest beam of a satellite antenna radiation pattern is ________

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The smallest beam of a satellite antenna radiation pattern is ________

(a) Zone beam

(b) Hemispheric beam

(c) Spot beam

(d) Global beam

I had been asked this question in final exam.

This interesting question is from Satellite Systems topic in portion Satellite Systems & Recent Advances of Wireless/Mobile

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Best answer
The correct choice is (c) Spot beam

The best explanation: The size of the antenna that generates these beams on earth is related directly to the peak gain at the center of the spot beams and the smallest spot beam size. The spot beams are typically defined by the contours at 3 or 4 dB down from the peak power at the center of the beam.

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