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Which of the following antenna belongs to rectangular aperture?

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Which of the following antenna belongs to rectangular aperture?

(a) Horn antenna

(b) Helical antenna

(c) Parabolic antenna

(d) Conical antenna

This question was addressed to me during a job interview.

The origin of the question is Radiation from Rectangular Aperture in chapter Aperture Antenna of Antennas

1 Answer

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Best answer
Right choice is (a) Horn antenna

The explanation is: The aperture of antenna at the end determines its shape. Horn antenna has a rectangular aperture. Helical, Parabolic, conical antenna have circular apertures. Helical antenna belongs to frequency independent antenna.

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