US 12,418,087 B2
Balun structure and electronic device
Hao Guo, Beijing (CN); Haocheng Jia, Beijing (CN); Yan Lu, Beijing (CN); Yi Ding, Beijing (CN); Wenxue Ma, Beijing (CN); Weisi Zhou, Beijing (CN); Jing Wang, Beijing (CN); Xiaobo Wang, Beijing (CN); and Chuncheng Che, Beijing (CN)
Assigned to Beijing BOE Sensor Technology Co., Ltd., Beijing (CN); and Boe Technology Group Co., Ltd., Beijing (CN)
Appl. No. 18/017,049
Filed by Beijing BOE Sensor Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jan. 21, 2022, PCT No. PCT/CN2022/073100
§ 371(c)(1), (2) Date Jan. 19, 2023,
PCT Pub. No. WO2023/137685, PCT Pub. Date Jul. 27, 2023.
Prior Publication US 2024/0250400 A1, Jul. 25, 2024
Int. Cl. H01P 5/10 (2006.01); H03H 7/42 (2006.01)
CPC H01P 5/10 (2013.01) [H03H 7/42 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A balun structure, comprising:
a dielectric substrate;
a first grounding conductive layer on one side of the dielectric substrate;
a first transmission line on one side of the dielectric substrate away from the first grounding conductive layer, wherein a first end of the first transmission line is electrically connected with an unbalanced signal port;
a second transmission line on the side of the dielectric substrate away from the first grounding conductive layer, wherein a first end of the second transmission line is electrically connected with a second end of the first transmission line, and a second end of the second transmission line is electrically connected with a first balanced signal port; and
a third transmission line on the side of the dielectric substrate away from the first grounding conductive layer, wherein a first end of the third transmission line is electrically connected with the second end of the first transmission line, and a second end of the third transmission line is electrically connected with a second balanced signal port;
wherein at least one coupling structure is connected in series between the first end and the second end of the third transmission line; the coupling structure comprises a first coupling part and a second coupling part; and in a same coupling structure, one end of the first coupling part facing the second coupling part is provided with at least one first branch line, and one end of the second coupling part facing the first coupling part is provided with at least one second branch line; and
in the same coupling structure, one end of the first branch line close to the second coupling part is electrically connected with the first grounding conductive layer through a first through hole, and one end of the second branch line close to the first coupling part is electrically connected with the first grounding conductive layer through a second through hole; and in the same coupling structure, the first branch line of the first coupling part is in coupling connection with the second branch line of the second coupling part.