US 2026/0121271 A1 · CAVITY FILTER

Abstract

A cavity filter includes a housing, an input resonator and an output resonator. The input resonator includes a first sheet resonant body, an input end extending outward from one side of the first sheet resonant body and a first branch extending outward from the first sheet resonant body and/or the input end, and the input end extends out of the housing through the input through hole. The output resonator includes a second sheet resonant body, an output end extending outward from one side of the second sheet resonant body, and a second branch extending outward from the second sheet resonant body and/or the output end, and the output end extends out of the housing through the output through hole. The lengths of the first branch and the second branch are both a quarter wavelength of a resonant frequency of the cavity filter.

Claims20

Dependent claims

A cavity filter, comprising:

a housing with an accommodating cavity, an input through hole and an output through hole, the input through hole and the output through hole communicating with the accommodating cavity;
an input resonator located in the accommodating cavity and disposed on the housing, the input resonator comprising a first sheet resonant body and a first branch, wherein the first branch is disposed on an outer side of the first sheet resonant body, adjacent to the input through hole, and connected to the first sheet resonant body;
and
an output resonator located in the accommodating cavity and disposed on the housing, the output resonator comprising a second sheet resonant body and a second branch, wherein the second branch is disposed on an outer side of the second sheet resonant body, adjacent to the output through hole, and connected to the second sheet resonant body;
wherein a length of the first branch and a length of the second branch are the same.

2 more elements

A cavity filter, comprising:

a housing with an accommodating cavity, an input through hole and an output through hole, the input through hole and the output through hole communicating with the accommodating cavity;
an input resonator located in the accommodating cavity and disposed on the housing, the input resonator comprising a first sheet resonant body, an input end and a first branch, the input end extending outward from one side of the first sheet resonant body, the first branch extending outward from the same side of the input end on the first sheet resonant body, wherein the input end and the first branch are connected to each other or the input end and the first branch are spaced apart from each other, and the input end extends out of the housing through the input through hole;
and
an output resonator located in the accommodating cavity and disposed on the housing, the output resonator comprising a second sheet resonant body and an output end, the output end extending outward from one side of the second sheet resonant body, the output end extending out of the housing through the output through hole;
wherein the first branch is configured to generate a resonance peak.

2 more elements

Dependencies are inferred from the claim text.

Cavity filter

Life of this patent

Cavity filter

Life of this patent

Abstract

Claims20