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Satellite Communication

Q1: In communication satellites, the up-link normally operates at a higher frequency than the down-link because it

A gives a narrow beam shining into space

B results in lesser signal attenuation

C gives better beam-shaping

D is easier to polarize a high frequency beam

ANS:A - gives a narrow beam shining into space

Obviously, the radius of the satellite is much smaller than the earth so use a narrow concentrated beam for uplink.



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