Main lobe

From Glossary of Meteorology



main lobe[edit | edit source]

(Or main beam.) The lobe in the radiation pattern of a directional antenna that includes the region of the maximum radiated power.

The center of the main lobe defines the beam axis. The beamwidth in a given plane is usually defined as the angle within which the radiated intensity is at least one-half the intensity in the direction of the beam axis.
See antenna pattern.


  1. A collimated source of electromagnetic radiation (e.g., a laser beam).
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