An RF Power amplifier is a type of electronic amplifier used to convert a low-power radio-frequency signal into a larger signal of significant power, typically for driving the antenna of a transmitter. PF Power is usually optimized to have high efficiency, high P1dB compression, good return loss on the input and output, good gain, and good heat dissipation.

RF Power amplifiers are used in transmitters to rebroadcast, at high power levels, amplitude modulation (AM) signals, frequency modulation (FM) signals, and quadrature amplitude modulation (QAM) signals. As is known, information is carried in theamplitudes of AM and QAM signals. Because of this, transmitters must accurately rebroadcast these signals, thus the power amplifiers within the transmitters must have high fidelity, i.e. linearly rebroadcast the signals they receive.