US 12,255,375 B2
AU and RU having CWG filters, and BS having the AU or RU
Yongbin Liu, Beijing (CN); Juandi Song, Beijing (CN); Yuhua Xiao, Beijing (CN); and Ying Li, Beijing (CN)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/907,800
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Mar. 29, 2021, PCT No. PCT/CN2021/083665
§ 371(c)(1), (2) Date Aug. 29, 2022,
PCT Pub. No. WO2021/197277, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. PCT/CN2020/082065 (WO), filed on Mar. 30, 2020.
Prior Publication US 2023/0147406 A1, May 11, 2023
Int. Cl. H01P 1/213 (2006.01); H01P 1/20 (2006.01); H01P 1/208 (2006.01); H01P 5/107 (2006.01)
CPC H01P 1/2136 (2013.01) [H01P 1/2002 (2013.01); H01P 1/2088 (2013.01); H01P 5/107 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An antenna unit comprising:
an antenna board comprising a plurality of antenna elements and one or more antenna ports coupled to the plurality of antenna elements; and
a plurality of filters having a respective plurality of radio frequency passbands, wherein:
a first one of the plurality of filters is a ceramic waveguide (CWG) filter,
the first filter is coupled to a second one of the plurality of filters through a T-junction formed on one of the following boards: the antenna board, or another board comprising the antenna unit, and
the T-junction is also coupled to one of the one or more antenna ports.