Define radiation efficiency of antenna.

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19. Define radiation efficiency of antenna.

Radiation efficiency of an antenna is defined as the ratio of the radiated output power to the supplied input power.

Radiation efficiency

where Prad is the power radiated by the antenna, Pin is the power supplied to the input of the antenna, and Ploss is the power lost in the antenna(dissipative losses) due to metal conductivity or dielectric loss with in the antenna.

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