What statement about the beamwidth of an RF antenna is true?
What statement about the beamwidth of an RF antenna is true?
Horizontal and vertical beamwidth are calculated at the points where the main lobe decreases power by 3 dB. This definition is standard in RF engineering, where the 3 dB point is used to define the beamwidth of an antenna.
A. CHAPTER 4 - PAGE 151 (Official Study Guide) "Antenna beamwidth is calculated horizontally and vertically where the signal drops by 3 dB."
A is correct. 7. Beamwidth is measured at the points where the main lobe decreases in power by 3 dB. The horizontal beamwidth is typically shown on the Azimuth chart and the vertical beamwidth is shown on the Elevation chart. When the gain of an antenna increases, the beamwidth decreases. When the beamwidth increases, the gain decreases.