US 11,955,682 B2
CWG filter, and RU, AU or BS having the same
Yongbin Liu, Beijing (CN); Jianlan Li, Beijing (CN); Mengyang Jia, Beijing (CN); and Ying Li, Beijing (CN)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/789,416
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Dec. 30, 2020, PCT No. PCT/CN2020/141458
§ 371(c)(1), (2) Date Jun. 27, 2022,
PCT Pub. No. WO2021/136389, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. PCT/CN2019/130526 (WO), filed on Dec. 31, 2019.
Prior Publication US 2023/0067193 A1, Mar. 2, 2023
Int. Cl. H01P 1/208 (2006.01); H01P 1/20 (2006.01); H01P 1/212 (2006.01); H01P 5/04 (2006.01)
CPC H01P 1/212 (2013.01) [H01P 1/2002 (2013.01); H01P 1/2088 (2013.01); H01P 5/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A ceramic waveguide filter, comprising a body that is made of ceramic and has a plurality of resonators each including a blind hole, the blind holes of two of the resonators opening at a first surface of the body and extending toward an opposite second surface of the body, and wherein capacitive coupling between the two resonators is achieved by a coupling structure on/in a substrate to which the body is attached at the side of the second surface.