Why are VHF, UHF, and microwave signals used in satellite communication?(a) More bandwidth(b) More spectrum space(c) Are not diffracted by the ionosphere(d) Economically viableI got this question during an online exam.Origin of the question is Satellite Communication Systems topic in section Satellite Communication of Avionics

Why are VHF, UHF, and microwave signals used in satellite communicatio

1.	Why are VHF, UHF, and microwave signals used in satellite communication?(a) More bandwidth(b) More spectrum space(c) Are not diffracted by the ionosphere(d) Economically viableI got this question during an online exam.Origin of the question is Satellite Communication Systems topic in section Satellite Communication of Avionics
Answer» Right answer is (c) Are not diffracted by the IONOSPHERE The EXPLANATION is: VHF, UHF, and MICROWAVE SIGNALS penetrate the ionosphere with little or no attenuation and are not refracted to earth. Lower frequencies undergo total internal refraction and GET reflected back to earth.

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