A dual-mode filter
By optimizing the structural design and tuning components of the dual-mode filter, the problems of difficult debugging and high cost of existing dual-mode filters have been solved, achieving a reduction in filter size and an improvement in performance.
CN117937081BActive Publication Date: 2026-06-19MOBILE ANTENNA TECH SHENZHEN +5
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MOBILE ANTENNA TECH SHENZHEN
- Filing Date
- 2023-12-07
- Publication Date
- 2026-06-19
AI Technical Summary
Technical Problem
Existing dual-mode filters are difficult to debug and have high production costs due to their complex dielectric structure, and they are also large in size.
Method used
The resonant cavity is formed by spaced protrusions inside the protective shell. The parallel coupling structure of single-mode and dual-mode resonators is used, combined with tuning components such as tuning compasses and screws for flexible adjustment, and the design of coupling window and coupling plate is optimized.
Benefits of technology
This achieved a 25% reduction in filter size, reduced insertion loss, simplified the debugging process, lowered production costs, and improved out-of-band rejection performance.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117937081B_ABST
Abstract
This invention proposes a dual-mode filter, comprising: a protective shell and multiple single-mode resonators; the protective shell has spaced protrusions and bends extending to form a perimeter plate dividing the interior of the protective shell into multiple resonant cavities; adjacent resonant cavities are interconnected through coupling windows; each single-mode dielectric resonator is detachably disposed within its corresponding resonant cavity; the filter also includes: a protective shell, at least one dual-mode dielectric resonator, mounting posts, and coupling plates; each dual-mode resonator is detachably disposed within a resonant cavity, and a parallel coupling structure is formed between the dual-mode resonator and the single-mode resonator; mounting posts are spaced apart within the resonant cavity; the coupling plates are located within the coupling windows and are fixed to the surface of the mounting posts via connectors. This invention, by reasonably adjusting the connection topology between the single-mode and dual-mode dielectric resonators, can significantly reduce the filter size while still achieving flexible placement of transmission zeros and frequency band tuning.
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