Question

In order to achieve good system efficiency in a corner reflector, the spacing between the vertex and the feed must be ______ as included angle decreases.

(a) Increased

(b) Decreased

(c) Constant

(d) Either increases or decreases

I had been asked this question in final exam.

Origin of the question is Corner Reflector in portion Reflector Antenna of Antennas

Answer 1

Right option is (a) Increased

For explanation I would say: The system efficiency in a corner reflector depends on the spacing between vertex of the corner and the feed.  It is adjusted depending on the included angle. As the included decreases, spacing must be increased.