You searched for: “effective isotropic radiated powers”
effective isotropic radiated power, EIRP (s) (noun), effective isotropic radiated powers (pl)
A measurement of the output of RFID reader antennas used in the United States and elsewhere: An effective isotropic radiated power is the assessment of the power of the signal departing from a satellite antenna in a certain direction.

EIRP is usually expressed in watts.

This entry is located in the following units: poten-, pot-, poss-, -potent, -potence, -potency, -potential + (page 1) Radio Frequency Identification (RFID): Definitions (page 3)