Antenna Half Power Beamwidth (3dB Angle) Calculator

Use this calculator to find the value of antenna 3dB Angle of an antenna from spot size in meter and distance from antenna and the equipment under test.

Enter the value of Antenna distance and Antenna spot size to get the 3dB Angle


  • Half Power Beam Width
Click here to view image

Angle3dB     - Represents the Half Power Beamwidth (HPBW) in degrees. 

Distance     - Distance between the equipment under test and the antenna

Spot meters   - Antenna spot size covered by the Angle3dB and the distance from antenna to equipment under test.

Half-power beamwidth is the angle between the half-power (-3 dB) points of the main lobe when referenced to the peak effective radiated power of the main lobe.


Calculator-detail../../ calculators