Effective Isotropic Radiated Power is the apparent power transmitted towards the receiver, if it is assumed that the signal is radiated equally in all directions, such as a spherical wave emanating from a point source; in other words, the arithmetic product of the power supplied to an antenna and its gain.

G: Antenna gain coefficient

g: Antenna gain [dBi]

P: Power [W]

Following table contains values for the Ku band. The values shown in the table assume having an Universal LNB with noise figure of 0.7 dB:

EIRP Field Intensity Antenna diameter 64 dBW 22 cm 63 dBW 24 cm 62 dBW 26 cm 61 dBW 28 cm 60 dBW 30 cm 59 dBW 32 cm 58 dBW 34 cm 57 dBW 36 cm 56 dBW 38 cm 55 dBW 40 cm 54 dBW 45 cm 53 dBW 50 cm 52 dBW 50 cm 51 dBW 55 cm 50 dBW 60 cm 49 dBW 60 cm 48 dBW 60 cm

EIRP Field Intensity Antenna diameter 47 dBW 75 cm 46 dBW 80 cm 45 dBW 90 cm 44 dBW 90 cm 43 dBW 100 cm 42 dBW 110 cm 41 dBW 120 cm 40 dBW 120 cm 39 dBW 135 cm 38 dBW 150 cm 37 dBW 180 cm 36 dBW 240 cm 35 dBW 300 cm 34 dBW 355 cm 33 dBW 400 cm 32 dBW 450 cm