Annotations for Beamwidth and Sidelobe Level

A specialised form of annotations is available to annotate far field results and to highlight beamwidth and sidelobe level.

A number of annotations for beamwidth and sidelobe level are provided. The sidelobe level is defined as the ratio between the maximum beam strength divided by the second largest beam strength. Annotations for locating the first null and the bandwidth from null to null are also provided.

Table 1. The reflection bandwidth annotation definitions available in POSTFEKO.
Icon	Icon text	Description
	Half power (-3dB)	The -3 dB half power beamwidth.
	First Null	The first null beamwidth.
	Null to Null	The null to null beamwidth.
	Sidelobe level	The sidelobe level.