# Half Power Beam Width MCQ’s

This set of Antenna Multiple Choice Questions & Answers (MCQs) focuses on “Half Power Beam Width”.

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

a) π28

b) π2

c) π218

d) 2

2. Beam width is the measure of directivity of antenna in terms of angles either radians or degrees.

a) True

b) False

3. Beam area and directivity are related as _____

a) D=2πB

b) D=4πB

c) D=B2π

d) D=B4π

4. Find the directivity when the half power beam widths are 45° and 60° in perpendicular planes.

a) 12.58

b) 17.98

c) 22.91

d) 15.28

5. Half-power beam width is also called as 6-db beam width.

a) True

b) False

6. What happens to the beam-width of antenna if the frequency of operation is increased?

a) Beam-width will decrease

b) Beam-width will increase

c) Beam-width is independent of frequency

d) Beam width may increase or decrease