Balanced radio frequency power amplifier, radio frequency front-end module, and electronic device

A balanced radio frequency power amplifier, comprising a driving-stage power unit, an inter-stage power divider, a main path power amplifier, an auxiliary path power amplifier, a first output matching network (A), a second output matching network (B), and an output power combiner, wherein

• an input end of the driving-stage power unit receives an input radio frequency signal, and an output end is connected to an input end of the inter-stage power divider and is configured to drive and amplify the input radio frequency signal;
• an in-phase output end of the inter-stage power divider is connected to an input end of the main path power amplifier, and a quadrature-phase output end of the inter-stage power divider is connected to an input end of the auxiliary path power amplifier and is configured to generate two radio frequency signals having equal amplitudes and a phase difference of 90°;
• an output end of the main path power amplifier is connected to an input end of the first output matching network (A), and an output end of the auxiliary path power amplifier is connected to an input end of the second output matching network (B);
• an output end of the first output matching network (A) is connected to an in-phase input end of the output power combiner, and an output end of the second output matching network (B) is connected to a quadrature-phase input end of the output power combiner;
• and
• the output power combiner is configured to receive two radio frequency signals having a same amplitude and a phase difference of 90°, and combine the two radio frequency signals into an output radio frequency signal.