Assertion: antenna's beamwidth | /r/HasProperty | the angle
Facets:
value: by convention
type: OTHER
Source sentences:
text: This last one is useful to measure the beamwidth, which is, by convention, the angle at the -3dB points around the max gain.
text: The beamwidth of the antenna is the width of the main lobe, usually specified by the half power beam width (HPBW), the angle encompassed between the points on the side of the lobe where the power has fallen to half (-3 dB) of its maximum value.