Bent Resonator Filter Layout for Compact Cross-Coupling
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Solution Overview
Problem
Traditional filters face challenges in miniaturization and design flexibility due to limitations in resonator structure and coupling mechanisms, leading to increased production costs and complexity, as well as restricted signal path and port positioning.
Innovation Solution
A compact filter design featuring integrally formed resonators with multiple bends and a partition wall that allows for flexible signal transmission paths and cross-coupling between non-adjacent resonators, reducing assembly costs and improving design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional resonators are bent into L-shape or T-shape to reduce space, then the filter volume is reduced, but the coupling between resonators becomes limited and requires additional conductors and assembly steps
Solution Approach 1:
The patent merges the resonator body with the coupling conductor into a single integrally formed resonator structure. The resonator includes a body portion and a coupling portion that extends from the body, eliminating the need for separate conductors and assembly steps while maintaining the required coupling functionality between resonators.
Solution Approach 2:
The coupling portion is pre-integrated into the resonator structure during manufacturing, so that the resonator is ready for assembly without requiring additional coupling components. This preliminary integration of the coupling function into the resonator body reduces assembly complexity and improves manufacturing efficiency.
2Adaptability or versatility
If additional conductors are added to non-adjacent resonators to realize cross-coupling, then the coupling functionality is improved, but the processing costs and assembly complexity increase
Solution Approach 1:
The coupling functionality is merged into the resonator structure itself through the coupling portion, eliminating the need for separate conductors. This integration reduces the number of components, lowers processing costs, and simplifies assembly while maintaining full cross-coupling functionality between non-adjacent resonators.
3Reliability
If resonators are directly welded or chip conductors are fixed to achieve cross-coupling, then the coupling strength is improved, but the sensitivity to position tolerances and spacing increases
Solution Approach 1:
The resonator body and coupling portion are integrally formed as a single piece, eliminating the need for welding or separate fixing operations. This integration removes the sensitivity to position tolerances and spacing that arises from assembly processes, while maintaining strong and reliable coupling between resonators.
4Device complexity
If the transmission path is limited to in-line or U-shape configurations, then the resonator arrangement is simplified, but the port position flexibility is reduced
Solution Approach 1:
The resonator structure incorporates a configurable coupling portion that can be designed in different orientations and configurations. This dynamic design flexibility allows the transmission path to be adapted to various port position requirements while maintaining a relatively simple overall structure, enabling customization for different application needs.
Data Source
AI summary
A filter includes a filter frame and at least two resonators. A receiving space is formed in the filter frame. The at least two resonators are disposed in the receiving space and distributed along a signal transmission path. Adjacent resonators on the signal transmission path are coupled. Each resonator includes a body part and a bending part. One end of the body part is grounded. The bending part includes a head bending part and an end bending part, the head bending part being connected to the end bending part to form a resonator structure circulating in a counterclockwise or clockwise direction.