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Microwave Communication

Q1:

If f is the frequency of electromagnetic wave, fc is cutoff frequency, then in a rectangular waveguide

A attenuation is low when f > fc

B attenuation is low when f < fc

C attenuation is high when f < fc

D either (b) or (c)

ANS:A - attenuation is low when f > fc

Wavelength should be less than cutoff wavelengths. Therefore frequency should be higher than cutoff frequency for minimum attenuation.



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