US 12,218,635 B2
Power amplifier circuit
Zhixiong Zeng, Shanghai (CN); Jie Sun, Shanghai (CN); and Hailei Suo, Chengdu (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on May 28, 2021, as Appl. No. 17/333,299.
Application 17/333,299 is a continuation of application No. PCT/CN2018/118500, filed on Nov. 30, 2018.
Prior Publication US 2021/0288616 A1, Sep. 16, 2021
Int. Cl. H03F 1/02 (2006.01); H03F 1/56 (2006.01); H03F 3/24 (2006.01); H03F 3/60 (2006.01)
CPC H03F 1/0288 (2013.01) [H03F 1/56 (2013.01); H03F 3/245 (2013.01); H03F 3/602 (2013.01); H03F 2200/318 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power amplifier circuit, comprising:
a first branch, comprising a first amplifier and a first matching network that are cascaded, wherein a first end of the first branch is a signal input end of the first amplifier, and a second end of the first branch is connected to a first input end of a first coupled line;
a second branch, comprising a second amplifier and a second matching network that are cascaded, wherein a first end of the second branch is a signal input end of the second amplifier, a second end of the second branch is connected to a second input end of the first coupled line, and the first coupled line enables the first branch and the second branch to form a first combiner;
a third branch, comprising a third amplifier and a third matching network that are cascaded, wherein a first end of the third branch is a signal input end of the third amplifier, and a second end of the third branch is connected to a first input end of a second coupled line; and
a fourth branch, comprising a fourth amplifier and a fourth matching network that are cascaded, wherein a first end of the fourth branch is a signal input end of the fourth amplifier, a second end of the fourth branch is connected to a second input end of the second coupled line, and the second coupled line enables the third branch and the fourth branch to form a second combiner, wherein
a first output end of the first coupled line is a signal output end of the power amplifier circuit, and a second output end of the first coupled line is connected to a first output end of the second coupled line, to enable the first combiner and the second combiner to form a series combiner, wherein the first coupled line and the second coupled line each have four ports including the first input end, the second input end, the first output end, and the second output end, and each includes a first microstrip and a second microstrip that are coupled to each other.