Multiband power amplifier circuit and radio frequency transceiver

A radio frequency transceiver comprising:

• a multiband power amplifier circuit comprising a first power transistor, a second power transistor, a first matching circuit, a second matching circuit, a third matching circuit, and a combiner, wherein the first power transistor is coupled to a first input end of the combiner via the first matching circuit, wherein the second power transistor is coupled to a second input end of the combiner via the second matching circuit, wherein a first end of the third matching circuit is coupled to an output end of the first power transistor, a second end of the third matching circuit is coupled to an output end of the second power transistor, and wherein the third matching circuit is configured to directly connect the output end of the first power transistor to the output end of the second power transistor, wherein the third matching circuit is a microstrip;
• and
• an analog baseband, wherein the analog baseband is configured to output a multiband radio frequency signal to the multiband power amplifier circuit, and the multiband power amplifier circuit is configured to amplify the multiband radio frequency signal.