# 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

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