CWNA-109 Question #107: Real Exam Question with Answer & Explanation

The correct answer is A. Horizontal and vertical beamwidth are calculated at the points where the main lobe decreases. The beamwidth of an RF antenna is the angular measure of how wide the main lobe of radiation is. The main lobe is the area where the signal strength is highest and most concentrated. The beamwidth is calculated at the points where the main lobe decreases power by 3 dB, which mean

Question

What statement about the beamwidth of an RF antenna is true?

Options

AHorizontal and vertical beamwidth are calculated at the points where the main lobe decreases
BThe beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops
CWhen antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical
DVertical beamwidth is displayed (in degrees) on the antenna's Azimuth chart.

Explanation

The beamwidth of an RF antenna is the angular measure of how wide the main lobe of radiation is. The main lobe is the area where the signal strength is highest and most concentrated. The beamwidth is calculated at the points where the main lobe decreases power by 3 dB, which means it is half of the maximum power. The beamwidth can be measured in both horizontal and vertical planes, depending on how the antenna is oriented. The horizontal beamwidth is also called azimuth, while the vertical beamwidth is also called elevation. The beamwidth patterns on an antenna polar chart indicate how the RF energy is distributed in different directions.

Community Discussion

No community discussion yet for this question.

Full CWNA-109 Practice