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In which of the following the aperture blocking is reduced by permitting antenna to operate in a single polarization?

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In which of the following the aperture blocking is reduced by permitting antenna to operate in a single polarization?

(a) Truncated reflector

(b) Cassegrain

(c) Polarization-twist reflector

(d) Plane reflector

I got this question by my school teacher while I was bunking the class.

The question is from Aperture Blockage in division Reflector Antenna of Antennas

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The correct choice is (c) Polarization-twist reflector

Explanation: Aperture blocking is reduced by permitting the antenna to operate with a single polarization in Polarization-twist reflector. Truncated reflector is a type of parabolic reflector. Cassegrain is a dual reflector.

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