US 11,791,553 B2
Phase shifter, fabrication method thereof, and antenna
Kerui Xi, Shanghai (CN); Xuhui Peng, Shanghai (CN); Feng Qin, Shanghai (CN); Tingting Cui, Shanghai (CN); Qinyi Duan, Chengdu (CN); and Qiongqin Mao, Shanghai (CN)
Assigned to Shanghai Tianma Micro-Electronics Co., Ltd., Shanghai (CN); and Chengdu Tianma Micro-Electronics Co., Ltd., Chengdu (CN)
Appl. No. 17/425,572
Filed by Shanghai Tianma Micro-Electronics Co., Ltd., Shanghai (CN); and Chengdu Tianma Micro-Electronics Co., Ltd., Chengdu (CN)
PCT Filed Aug. 24, 2020, PCT No. PCT/CN2020/110756
§ 371(c)(1), (2) Date Jul. 23, 2021,
PCT Pub. No. WO2022/016646, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 202010721226.6 (CN), filed on Jul. 24, 2020.
Prior Publication US 2022/0320731 A1, Oct. 6, 2022
Int. Cl. H01Q 21/06 (2006.01); H01Q 3/36 (2006.01)
CPC H01Q 3/36 (2013.01) 20 Claims
OG exemplary drawing
 
1. A phase shifter, comprising:
a first substrate and a second substrate that are disposed opposite to each other;
a ground electrode disposed on a side of the first substrate facing towards the second substrate;
a transmission electrode disposed on a side of the second substrate facing towards the first substrate, wherein the transmission electrode overlaps the ground electrode in a direction perpendicular to a plane of the second substrate; and
liquid crystals filled between the first substrate and the second substrate,
wherein the ground electrode is provided with at least one detection hollow part, and at least a part of the at least one detection hollow part does not overlap the transmission electrode in the direction perpendicular to the plane of the second substrate in such a manner that a light transmittance area through which detection light provided to the phase shifter is transmitted is formed in a liquid crystal cell of the phase shifter to allow the detection light to pass through the second substrate, the liquid crystals, and the at least one detection hollow part.