Question

In which of the following antennas the separation of sides increases as a function of length?

(a) Conical horn

(b) Exponential tapered pyramidal horn

(c) Pyramidal horn

(d) Sectoral horn

This question was posed to me during an online interview.

This intriguing question comes from Types topic in chapter Horn Antenna of Antennas

Answer 1

Correct answer is (b) Exponential tapered pyramidal horn

To explain: In exponentially tapered pyramidal horn, the transition region is gradually tapered exponentially to minimize the reflections. These are mainly used when reflections in the waveguide are critical.