Abstract: A Doherty power amplifier circuit comprises: a power divider, a carrier amplifier subcircuit, a combiner, and a peaking amplifier subcircuit, wherein a series resonance circuit is disposed between the carrier amplifier subcircuit and the combiner. In this way, reactance that would be introduced during an operating process of a conventional Doherty power amplifier circuit can be neutralized, such that a superior performance of the Doherty power amplifier circuit is ensured, and at the same time, a load-pull effect of the Doherty power amplifier circuit is improved to have a wider bandwidth, thereby realizing a communication device supporting operations in multiple frequency bands and multiple systems at the same time, and effectively lowering manufacturing and operation costs.

Abstract: A Doherty power amplifier circuit comprises: a power divider, a carrier amplifier subcircuit, a combiner, and a peaking amplifier subcircuit, wherein a series resonance circuit is disposed between the carrier amplifier subcircuit and the combiner. In this way, reactance that would be introduced during an operating process of a conventional Doherty power amplifier circuit can be neutralized, such that a superior performance of the Doherty power amplifier circuit is ensured, and at the same time, a load-pull effect of the Doherty power amplifier circuit is improved to have a wider bandwidth, thereby realizing a communication device supporting operations in multiple frequency bands and multiple systems at the same time, and effectively lowering manufacturing and operation costs.