A parabolic reflector is designed to have a directivity of 30 dB at 300 MHz. If the aperture efficiency is 55% then the half power beamwidth is

A parabolic reflector is designed to have a directivity of 30 dB at 30

1.	A parabolic reflector is designed to have a directivity of 30 dB at 300 MHz. If the aperture efficiency is 55% then the half power beamwidth is
A.	4.31°
B.	8.62°
C.	17.24°
D.	none of these
Answer» E.

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A parabolic reflector is designed to have a directivity of 30 dB at 300 MHz. If the aperture efficiency is 55% then the half power beamwidth is

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