US 11,990,661 B2
TM mode filter and method for manufacturing TM mode filter
Bengui Yuan, Shanghai (CN); Puke Zhou, Shanghai (CN); and Jinyan Li, Dongguan (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Jun. 28, 2021, as Appl. No. 17/360,679.
Application 17/360,679 is a continuation of application No. PCT/CN2018/124755, filed on Dec. 28, 2018.
Prior Publication US 2021/0328316 A1, Oct. 21, 2021
Int. Cl. H01P 7/10 (2006.01); H01P 1/20 (2006.01); H01P 1/201 (2006.01); H01P 1/208 (2006.01); H01P 11/00 (2006.01)
CPC H01P 1/2086 (2013.01) [H01P 1/2002 (2013.01); H01P 1/201 (2013.01); H01P 1/2084 (2013.01); H01P 7/10 (2013.01); H01P 11/007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A transverse magnetic wave (TM) mode filter, comprising:
a filter body, the filter body comprising a filter cavity and a cover, and having hollow confined space, wherein a first step-shaped protrusion structure is disposed at the bottom of the filter cavity, and the first step-shaped protrusion structure comprises a first protrusion that is in contact with the bottom of the filter cavity and a second protrusion that is located on the first protrusion;
a dielectric, the dielectric located in the hollow confined space; and
a transition layer, the transition layer configured to connect the dielectric and the filter body, wherein a coefficient of thermal expansion (CTE) of the transition layer is between a CTE of the filter body and a CTE of the dielectric.