US 12,150,241 B2
Antenna impedance matching circuit, antenna system and mobile terminal
Wei Chen, Guangdong (CN); Junsheng Hou, Guangdong (CN); and Song Bai, Guangdong (CN)
Assigned to HuiZhou TCL Mobile Communication Co., Ltd., HuiZhou (CN)
Appl. No. 17/615,843
Filed by HuiZhou TCL Mobile Communication Co., Ltd., Guangdong (CN)
PCT Filed Dec. 18, 2019, PCT No. PCT/CN2019/126177
§ 371(c)(1), (2) Date Dec. 2, 2021,
PCT Pub. No. WO2021/109248, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 201911222771.4 (CN), filed on Dec. 3, 2019.
Prior Publication US 2022/0336960 A1, Oct. 20, 2022
Int. Cl. H01Q 5/50 (2015.01); H01P 5/16 (2006.01); H03H 7/38 (2006.01); H04B 1/18 (2006.01); H05K 1/02 (2006.01)
CPC H05K 1/025 (2013.01) [H01P 5/16 (2013.01); H01Q 5/50 (2015.01); H03H 7/38 (2013.01); H04B 1/18 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An antenna impedance matching circuit comprising:
a first transmission line, wherein the first transmission line having a first specific length that makes the first transmission line capacitive; and
a second transmission line, wherein the second transmission line having a second specific length that makes the second transmission line inductive;
wherein the first transmission line and the second transmission line are connected in parallel and wherein terminals of the first transmission line and the second transmission line are open or shorted;
the antenna impedance matching circuit comprises:
a first line connected in parallel with a line containing an antenna feeder line, for holding the first transmission line having the first specific length; and
a second line connected in parallel with the line containing the antenna feeder line, for holding the second transmission line having the second specific length;
wherein a terminal of the first line is configured to enclose the terminal of the first transmission line to unground the first transmission line, or is configured to be open to ground the first transmission line, and a terminal of the second line is configured to enclose the terminal of the second transmission line to unground the second transmission line, or is configured to be open to ground the second transmission line.