View source for File:Effective isotropic radiated power illustration.svg.png

== Summary ==
Radiation patterns illustrating the definition of effective isotropic radiated power (EIRP) of a radio transmitter. It shows a typical radiation pattern of a directive (high gain) antenna and an ideal isotropic antenna| which has the same power flux density as the directive antenna in the direction of its maximum signal strength (main lobe). The transmitted power that would have to be applied to the isotropic antenna to radiate the same signal strength is the effective isotropic radiated power (EIRP).

Created by Chetvorno.

Source: https://commons.wikimedia.org/wiki/File:Effective_isotropic_radiated_power_illustration.svg