US 12,170,412 B2
Broadband patch antenna
Dongkyu Kim, Seoul (KR); Byung-Wook Min, Seoul (KR); Kyutae Park, Seoul (KR); and Donghyun Lee, Gyeonggi-do (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR); and INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY, Seoul (KR)
Appl. No. 17/753,809
Filed by LG ELECTRONICS INC., Seoul (KR); and INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY, Seoul (KR)
PCT Filed Oct. 17, 2019, PCT No. PCT/KR2019/013674
§ 371(c)(1), (2) Date Mar. 15, 2022,
PCT Pub. No. WO2021/075602, PCT Pub. Date Apr. 22, 2021.
Prior Publication US 2022/0344822 A1, Oct. 27, 2022
Int. Cl. H01Q 9/04 (2006.01); H01Q 5/35 (2015.01)
CPC H01Q 9/0435 (2013.01) [H01Q 5/35 (2015.01); H01Q 9/0442 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A broadband patch antenna comprising:
a substrate;
a ground plate attached to one surface of the substrate;
a radiation plate attached to the center of the other surface facing the one surface of the substrate; and
a feed line attached to the other surface of the substrate and having one end connected to the radiation plate,
wherein the feed line includes a first line and a second line,
the ground plate has an “L” shape having a first groove, a second groove, and a third groove,
the ground plate does not include a portion corresponding to the radiation plate,
the first groove is located in a first portion corresponding to a connecting portion of the first line and the radiation plate,
the second groove is located in a second portion corresponding to a connecting portion of the second line and the radiation plate, and
the third groove is located to be spaced apart from the first groove and the second groove, and
wherein the third groove is formed in a position where a plurality of different circular polarizations including a first circular polarization for a first phase current and a second circular polarization, having an opposite circular direction to the first circular polarization, for a second phase current occur, and
wherein the radiation plate has a first rectangular shape, the third groove has a second rectangular shape, and the third groove having the second rectangular shape is formed in a diagonal direction with respect to the radiation plate having the first rectangular shape.