The effective area of a parabolic dish antenna is approximately equal to its physical aperture. If the

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The effective area of a parabolic dish antenna is approximately equal to its physical aperture. If the directivity of a dish antenna is 30 dB at 10 GHz, what is its effective area? If the frequency is increased to 30 GHz, what will be its new directivity?
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Fundamentals of Applied Electromagnetics

ISBN: 978-0132139311

6th edition

Authors: Fawwaz T. Ulaby, Eric Michielssen, Umberto Ravaioli

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