Total Radiated Power (TRP) is a RF engineering term used to describe the sum of all power radiated by an antenna connected to a transmitter. Total Radiated Power is closely related to the efficiency of the antenna, and is in fact tied to the definition of efficiency. In Figure 1 below, TRP is the Output Power, or Pout. Antenna efficiency, ηantenna, is the ratio of output power to input power. TRP is expressed in terms of power: Watts (W), milliwatts (mW), or the logarithmic terms for W and mW (dBW and dBm). Antenna efficiency is expressed either in percentage or dB.
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