A dual-mode filter and integrated filter

By setting adjustment components and module structures in the filter and optimizing with simulation software, the problems of large size and inaccurate frequency adjustment of dual-mode filters were solved, achieving miniaturization and precise frequency adjustment.

CN120767564BActive Publication Date: 2026-05-26RSINNC TECHNOLOGIES LTD
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Patent Information

Application Number
CN202511085718.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-04
Publication Date
2026-05-26
Estimated Expiration
2045-08-04

AI Technical Summary

Technical Problem

How to reduce the size of a dual-mode filter and achieve accurate frequency adjustment while maintaining filter performance, especially for ceramic dielectric filters?

Method used

The design employs a structure comprising a first metal resonant module, a second metal resonant module, and a coupled metal resonant module. By setting adjustment components, such as holes or conductive rings, on the diagonal of the ceramic resonator, and combining simulation software to optimize the size and position of the adjustment components, precise adjustment of the resonant frequency can be achieved.

Benefits of technology

This has enabled a reduction in filter size while allowing for precise frequency adjustment to meet different needs, thereby improving the filter's production reliability and performance stability.

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Abstract

This application provides a dual-mode filter and an integrated filter. The dual-mode filter includes a first metal resonant module, a second metal resonant module, and a coupled metal resonant module. The coupled metal resonant module includes at least one or more of these modules. Each coupled metal resonant module includes at least a first metal cavity, a second metal cavity, and a ceramic resonator. A first adjustment component is provided on the diagonal of the ceramic resonator. The first adjustment component is used to adjust the resonant frequency. The first adjustment component includes at least a hole, an addition module, or a combination of a hole and an addition module, which can be set according to different product requirements. By providing the first adjustment component on the ceramic resonator in the coupled metal resonant module, it is possible to hollow out or add material on the diagonal of the ceramic resonator to adjust the resonant frequency. This allows for accurate adjustment of the filter's frequency while ensuring a small filter size.
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Citation Information

Patent Citations

  • Small-sized microwave dielectric dual-mode filter

    CN112886163A

  • Dielectric dual-mode filter

    CN115441137A

  • Dual-mode resonator, dual-mode filter and multiplexer

    CN119481654A