Assertion: antenna's beamwidth | /r/HasProperty | specified by half power beam width
Facets:
value: usually
type: TEMPORAL
Source sentences:
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.