Question

The beam gets deteriorated when it is moved along a line perpendicular to the main axis passing through focus?

(a) True

(b) False

The question was asked in unit test.

Enquiry is from Feeding Systems in section Reflector Antenna of Antennas

Answer 1

Right option is (a) True

Explanation: Beam pattern is maximum only when the feed is placed at the focus of the parabola. When the feed is moved along the main axis, beam gets broadened. When it is moved along perpendicular line beam gets deteriorated.