The invention discloses a push-pull radio-frequency power
amplifier with improved
linearity and efficiency, comprising an input matching network, an output matching network and a power amplification circuit, wherein the power amplification circuit comprises a first-stage amplification circuit and a second-stage amplification circuit, the first-stage amplification circuit is connected with the input matching network, the second-stage amplification circuit is connected between the first-stage amplification circuit and the output matching network, and the second-stage amplification circuit is an NPN-NPN push-pull amplification circuit composed of a second
common collector amplifying tube and a second common-emitter amplifying tube. The output matching network is an output filter matching network which comprises a secondary
harmonic series
resonance network, a
third harmonic series
resonance network and a stopping condenser, wherein the secondary
harmonic series
resonance network is connected between the output end of the second-stage amplification circuit and the ground, the
third harmonic series resonance network is connected between the output end of the secondary
harmonic series resonance network and the stopping condenser, and the stopping condenser is connected between the
third harmonic series resonance network and the power
amplifier. The invention improves the additional efficiency of the radio-frequency power
amplifier and improves the
linearity of the radio-frequency power amplifier.