Question

What is the Beam area in radians when the HPBW in perpendicular planes are given by 60°, 30°?

(a) \(\frac{\pi^2}{8}\)

(b) \(\frac{\pi}{2}\)

(c) \(\frac{\pi^2}{18}\)

(d) 2

This question was addressed to me by my school teacher while I was bunking the class.

The question is from Half Power Beam Width topic in chapter Antenna Beam Width & Input Impedance of Antennas

Answer 1

Right option is (c) \(\frac{\pi^2}{18}\)

Easy explanation: Beam area B=θE θH=60°×30°=\(\frac{\pi}{3}×\frac{\pi}{6}=\frac{\pi^2}{18}\)