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Which of the following is formed by moving parabolic counter parallel to itself?

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Which of the following is formed by moving parabolic counter parallel to itself?

(a) Parabolic cylinder

(b) Pill box

(c) Cheese antenna

(d) Truncated antenna

This question was addressed to me in a job interview.

My question comes from Application of Parabolic Reflector in division Reflector Antenna of Antennas

1 Answer

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Right answer is (a) Parabolic cylinder

The explanation: A parabolic cylinder is formed by moving the parabolic counter parallel to itself. It consists of a line of focus unlike the focal point in basic parabolic antenna. Pillbox or cheese antenna is obtained from the parabolic cylinder reflector. Truncated is obtained by cutting some part of parabolic antenna.

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