| product of the power supplied by a radio transmitter to an antenna and the relative gain of the antenna in a given direction, with respect to a half-wave dipole
Note 1 to entry: The use of the quantity equivalent isotropically radiated power (referring to absolute gain) is preferable to that of the quantity effective radiated power (referring to relative gain).
Note 2 to entry: The term "effective radiated power" is also used when the reference antenna is not a half-wave dipole (see IEV 161-04-16).
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