Question

Angular width between the first nulls or first side lobes is called as _______

(a) half power beam width

(b) full null beam width

(c) beam area

(d) directivity

This question was addressed to me in an interview for internship.

My question comes from First Null Beam Width topic in section Antenna Beam Width & Input Impedance of Antennas

Answer 1

Correct option is (b) full null beam width

Easy explanation: Angular width between the first nulls or first side lobes is called full null beam width. Half power beam width is the angular width measured between the 3dB power points of the major lobe. Beam area is the product of HPBW in perpendicular directions. Directivity is the maximum directive gain.