US 11,799,180 B2Granted

Band-stop filter, transmission line for band-stop filter and multiplexer

AssigneeCommScope Italy S.r.l.

InventorsXianxiang Li, Yangzhun Lv, Qing Mi, Qiyun Gu, Giuseppe Resnati

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Abstract

A band-stop filter comprises: a housing having a top wall, a bottom wall and at least one side wall, the housing defining an internal cavity; a signal input port and a signal output port that are respectively disposed on one of the at least one side wall; a resonating element that is disposed in the internal cavity and includes a top, a bottom, and a side; and a transmission line that is disposed in the internal cavity and coupled between the signal input port and the signal output port, the transmission line comprising a coupling section that is coupled to the resonating element, wherein the coupling section is configured to surround more than half of the side of the resonating element and not directly contact the housing and the resonating element.

Claims18

Dependent claims

A radio frequency (“RF”) filter comprising:

a housing comprising a top wall, a bottom wall and at least one side wall, the housing defining an internal cavity;
a signal input port that is disposed on the housing;
a signal output port that is disposed on the housing;
a first resonating element that is disposed in the internal cavity and extends upwardly from the bottom wall of the housing;
a second resonating element that is disposed in the internal cavity and extends upwardly from the bottom wall of the housing;
a partition in the internal cavity between the first resonating element and the second resonating element, an upper end of the partition including a recess;
and
a transmission line that is disposed in the internal cavity and extends between the signal input port and the signal output port, the transmission line comprising a first coupling section that is coupled to the first resonating element, a second coupling section that is coupled to the second resonating element, and a connecting section that extends through the recess in the partition, and
wherein the first coupling section is configured to surround more than half of a side of the first resonating element without directly contacting the housing and the first resonating element.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/483,391Filed 23 Sep 2021 · continuation
Priority: CN 201910193260.814 Mar 2019
Published: US 2022/0029261 A127 Jan 2022
Granted: 24 Oct 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H01P 1/2053
Comb or interdigital filters; Cascaded coaxial cavities: the coaxial cavity resonators being disposed parall to each other
H01P 1/207
Frequency-selective devices, e.g. filters: hollow waveguide filters
H01P 1/202
Filters for transverse electromagnetic waves: coaxial filters
H01P 1/208
Hollow waveguide filters: cascaded cavities; Cascaded resonators inside a hollow waveguide structure

Family

Application16/804,024Parent of this continuation · filed 28 Feb 2020
US 2022/0029261 A1Pre-grant publication · published 27 Jan 2022
US 11,158,918 B2Parent of this continuation
US 2020/0295423 A1Published application
US 11,799,180 B2This patent

From the US filing history. Foreign family members aren’t listed.