minor lobe

Side lobes are normally the largest of the minor lobes.

Minor lobes usually represent radiation in undesired directions, and they should be minimized.

A minor lobe is any lobe except a major lobe.

Usually it refers to a minor lobe that occupies the hemisphere in a direction opposite to that of the major (main) lobe.

The level of minor lobes is usually expressed as a ratio of the power density in the lobe in question to that of the major lobe.

The beam solid angle can be approximated for antennas with one narrow major lobe and very negligible minor lobes, by simply multiplying the half-power beamwidths (in radians) in two perpendicular planes.