The invention discloses a power
amplifier based on comb filtering. The power
amplifier comprises an input port, an input matching circuit, a biasing circuit, a
transistor, an output matching circuit,a
harmonic suppression circuit and an output port which are sequentially connected; a
signal to be amplified is connected to the input port and is transmitted to the input matching circuit, and the
signal is amplified through the biasing circuit and the
transistor; and the amplified
signal is filtered by the output matching circuit and the
harmonic suppression circuit, and the filtered signal is transmitted to a signal receiving device through the output port. According to the invention, higher
harmonics of the power
amplifier are mainly suppressed;
harmonic energy generated by the power amplifier is recovered through combination of the comb-shaped harmonic suppression circuit and the output matching network. The power amplifier is simple in structure, suppresses harmonic components at a load, guarantees the efficiency of the power amplifier, enables the power amplifier to be easy to realize, achieves the purpose of high efficiency, facilitates
miniaturization and integration of a communication
system, and has very good practical value.