Multiband power amplifier circuit and radio frequency transceiver
Embodiments of this application provide a multiband power amplifier circuit and a radio frequency transceiver, to increase a VBW while ensuring linear correction and reducing a circuit loss. The multiband power amplifier circuit includes a first power transistor, a second power transistor, a first matching circuit, a second matching circuit, a third matching circuit, and a combiner. The first power transistor is coupled to a first input end of the combiner via the first matching circuit. The second power transistor is coupled to a second input end of the combiner via the second matching circuit. A first end of the third matching circuit is coupled to an output end of the first power transistor, and a second end of the third matching circuit is coupled to an output end of the second power transistor.
1 . 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.
2 . The multiband power amplifier circuit according to claim 1 , wherein the third matching circuit is located inside a package of the first power transistor or a package of the second power transistor.
3 . The multiband power amplifier circuit according to claim 1 , wherein the third matching circuit is located inside packages of the first power transistor and the second power transistor.
4 . The multiband power amplifier circuit according to claim 1 , wherein the third matching circuit is located outside packages of the first power transistor and the second power transistor.
5 . The multiband power amplifier circuit according to claim 1 , wherein the third matching circuit is located on an output pad of a die of the first power transistor and an output pad of a die of the second power transistor.
6 . 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.
7 . The radio frequency transceiver according to claim 6 , wherein the third matching circuit is located inside a package of the first power transistor or a package of the second power transistor.
8 . The radio frequency transceiver according to claim 6 , wherein the third matching circuit is located inside packages of the first power transistor and the second power transistor.
9 . The radio frequency transceiver according to claim 6 , wherein the third matching circuit is located outside packages of the first power transistor and the second power transistor.
10 . The radio frequency transceiver according to claim 6 , wherein the third matching circuit is located on an output pad of a die of the first power transistor.
11 . The radio frequency transceiver according to claim 6 , wherein the third matching circuit is located on an output pad of a die of the first power transistor and an output pad of a die of the second power transistor.
12 . A multi-antenna radio frequency transceiver comprising:
a phase-locked loop;
a local oscillator;
a digital baseband; and
a plurality of radio frequency circuits, each of the plurality of radio frequency circuits comprising a transmitter analog baseband, a power amplifier, an antenna, and a frequency mixer,
the power amplifier 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.
13 . The multi-antenna radio frequency transceiver of claim 12 , wherein an output of the phase-locked loop is coupled to an input of the local oscillator, wherein an output end of the local oscillator is coupled to a first input end of the frequency mixer, wherein the digital baseband is coupled to an input end of the transmitter analog baseband, wherein an output end of the transmitter analog baseband is coupled to a second input end of the frequency mixer, wherein an output end of the frequency mixer is coupled to an input end of the power amplifier, and wherein an output end of the power amplifier is connected to the antenna.