US 12,463,313 B2
Integrated low-pass and band-pass filter unit formed by sheet metal coated with dielectric material
Jun Fu, Beijing (CN); Weidong Wang, Beijing (CN); and Xueyuan Zhang, Beijing (CN)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/692,276
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Apr. 26, 2022, PCT No. PCT/SE2022/050401
§ 371(c)(1), (2) Date Mar. 14, 2024,
PCT Pub. No. WO2023/043350, PCT Pub. Date Mar. 23, 2023.
Claims priority of application No. PCT/CN2021/118317 (WO), filed on Sep. 14, 2021.
Prior Publication US 2024/0267029 A1, Aug. 8, 2024
Int. Cl. H01P 1/208 (2006.01); H01P 7/06 (2006.01); H01Q 23/00 (2006.01); H03H 9/54 (2006.01)
CPC H01P 1/2084 (2013.01) [H01P 7/06 (2013.01); H01Q 23/00 (2013.01); H03H 9/54 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An integrated low-pass and band-pass filter unit comprising:
an inner cavity formed by a shell of conductive materials;
one or more low-pass resonators and two or more band-pass resonators comprised in the inner cavity, wherein the low-pass and band-pass resonators are integrally formed by electroplated sheet metal material, and a part of each of the low-pass and band-pass resonators is coated with dielectric material, and wherein the two or more band-pass resonators are arranged at two sides of the inner cavity such that at least two resonators are aligned to face each other;
a first separator of electroplated sheet metal arranged in the inner cavity between the low-pass resonators and band-pass resonators;
a second separator of electroplated sheet metal arranged in the inner cavity between the band-pass resonators at the two sides of the inner cavity;
an input port to receive a signal to be filtered; and
an output port to output a filtered signal.