Radio frequency power amplifier, radio frequency front-end module, and communication terminal

A radio frequency power amplifier comprising a control unit, a power amplification unit, a detection and comparison unit, and a gain adjustment unit, wherein an output end of the control unit is connected to input ends of the detection and comparison unit and the gain adjustment unit, a detection end of the power amplification unit is connected to the input end of the detection and comparison unit, an output end of the detection and comparison unit is connected to an input end of the control unit, and an output end of the gain adjustment unit is connected to a bias end of the power amplification unit;

• the detection and comparison unit is configured to detect and compare a bias current of the power amplification unit with a reference current in real time, the control unit is configured to controls the gain adjustment unit to generate an adjustment current and output the same to the power amplification unit when the bias current of the power amplification unit is greater than the reference current, and control the gain adjustment unit to stop outputting an adjustment current to the power amplification unit when the bias current of the power amplification unit is smaller than the reference current, so as to ensure that the gain of the power amplification unit operating at different powers is not changed.