Power amplifier

Abstract

The invention relates to a power amplifier. The power amplifier consists of: input (210), configured to input at least two signals with different frequencies; power tube (220), configured to: amplify at least two signals input by input (210), and produce the first nonlinear gain of at least two signals; first suppressor circuit (230), configured to suppress the first nonlinear gain; The output (240) is configured to output at least two signals amplified by the power tube (220), where the input (210) is connected to the output (240) via the power tube (220), and the power tube (220) is connected to the first suppression circuit (230); the input matching circuit (260) is configured to match the first impedance of the input (210) to the second impedance input by the power tube (220); The output matching circuit (270) is configured to match the third output impedance of the power tube (220) to the fourth output impedance (240). In this way, the power amplifier efficiency can be improved.