The results are increasingly approximate beyond the -3 dB contour.
The antenna gain shown in top line of the results is the on-axis gain. dBi means relative to an isotropic omni-directional antenna. Half the side to side beamwidth, if you are concerned to determine the offset angle from the beam centre.
The total side to side beamwidth of the antenna main beam. Enter the diameter of your parabolic dish in m (metres) and the operating frequency in GHz (Gigahertz)Ī typical VSAT is 1.2m diameter and transmits at 14 - 14.5 GHz
