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Which of the following is a dual reflector antenna?

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Which of the following is a dual reflector antenna?

(a) Cassegrain antenna

(b) Parabolic antenna

(c) Offset reflector antenna

(d) Wire antenna

I got this question in final exam.

This intriguing question comes from Basics topic in portion Reflector Antenna of Antennas

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Correct answer is (a) Cassegrain antenna

For explanation: A dual reflector antenna consists of two reflectors and one feed antenna. Cassegrain antenna is the best example of dual reflector antenna since it contains main reflector as parabolic and sub-reflector as hyperbola.

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