Beam Width and Gain Calculator

Use this tool to calculate the gain and beam width of a parabolic dish on a specific frequency.

Dish Diameter

Frequency

Efficiency


metres

GHz

(the dish efficiency is between 0.6 and 0.8)


    

dB down Full beamwidth (degrees) Half beamwidth (degrees) Gain (dBi)
0 0 0
0.25
0.5
1
2
3
4
4.5
5
6
7
10
15