Question

Which of the following wave conversion mechanism is performed in a parabolic reflector antenna?

(a) Plane to spherical

(b) Spherical to plane

(c) Performs both plane to spherical and spherical to plane

(d) Elliptic polarization

This question was addressed to me in an online quiz.

I want to ask this question from Parabolic Reflector Antenna in chapter Reflector Antenna of Antennas

Answer 1

Correct answer is (b) Spherical to plane

To explain I would say: In a parabolic reflector antenna, the wave conversion mechanism used is spherical to plane. It works on the principle of geometric optics. The reflected plane waves travel parallel o the major axis of the reflector.