Radiation Pattern Lobes
A radiation pattern lobe is a section of the radiation pattern surrounded by regions of relatively weak radiation intensity.
- Major lobe / main beam
 - The lobe in the radiation pattern containing the direction of maximum radiation.
 - Side lobe
 - The lobe in any direction other than the intended lobe and usually represent radiation in undesired directions.
 - Back lobe
 - The lobe in the radiation pattern that is in the opposite direction of the major lobe.
 

Characteristic values:
   - Side lobe attenuation
 - Back lobe attenuation
 - 3dB angle of main lobe
 - 3dB angle of side lobe