Planar Resonant Filter Layout for Compact High-Frequency Suppression
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Solution Overview
Problem
Existing resonant filters face challenges in miniaturization due to their multi-row design, which occupies large space and results in high processing difficulty and low dimensional accuracy.
Innovation Solution
A resonant filter design featuring metal resonant sheets located in the same plane, connected oppositely to form signal connections, eliminating the need for bending and allowing for a compact, single-layer structure with flexible port arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a multi-row design is used for the resonant member, then the signal connection is achieved, but the space occupied in the cavity increases
Solution Approach 1:
The patent transitions from a multi-row three-dimensional arrangement to a single-plane two-dimensional arrangement of resonant sheets. The resonant sheets are arranged in one plane rather than multiple rows, reducing the space occupied in the cavity while maintaining signal connection functionality through planar distribution.
Solution Approach 2:
The patent merges multiple resonant rows into a single planar structure. By combining the functionality of multiple rows into one plane with oppositely distributed resonant sheets, the design achieves signal connection while minimizing cavity space occupation.
2Adaptability or versatility
If a bending member is used in the resonant member, then the structural flexibility is improved, but the processing difficulty increases and dimensional accuracy decreases
Solution Approach 1:
The patent extracts and eliminates the bending member from the resonant structure. By removing the bending component entirely and using only flat resonant sheets arranged in a plane, the design simplifies processing while maintaining structural adaptability through planar configuration rather than bent geometries.
Solution Approach 2:
Instead of using bent structures to achieve flexibility, the patent inverts the approach by using flat structures arranged in specific patterns. The flexibility and adaptability are achieved through the planar arrangement and coupling of multiple resonant sheets rather than through bending individual components.
3Device complexity
If a multi-row design is used for the resonant member, then the signal connection is achieved, but the dimensional accuracy decreases
Solution Approach 1:
The patent improves dimensional accuracy by transitioning from three-dimensional multi-row arrangement to two-dimensional single-plane arrangement. This planar configuration reduces cumulative positioning errors and simplifies dimensional control compared to multi-row three-dimensional structures.
Solution Approach 2:
The patent segments the resonant structure into multiple individual resonant sheets arranged in a plane, each with controlled dimensions. This segmentation allows for precise manufacturing of individual flat sheets with higher dimensional accuracy compared to complex bent or multi-row structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves miniaturization, simplifies processing, enhances signal connection, and improves out-of-band signal suppression capabilities, particularly for frequencies above 5.5 GHz.
Implementation Method 1
coupling occurs between the plurality of metal resonant sheets to form a signal connection
Implementation Method 2
a resonant filter... a resonant member disposed in the cavity... The plurality of metal resonant sheets are located in the accommodating cavity
Data Source
AI summary
A resonant filter includes a casing, metal resonant sheets, an input port and an output port. The casing has an accommodating cavity and a first inner surface and a second inner surface arranged opposite to each other, and is provided with a first through hole and a second through hole communicating with the accommodating cavity. The metal resonant sheets are located in the accommodating cavity and are disposed on the first inner surface and the second inner surface. The metal resonant sheets are substantially located in a same plane and are distributed oppositely. Coupling occurs between the metal resonant sheets to form a signal connection. The input port is engaged with the first through hole and is connected to one metal resonant sheet. The output port is engaged with the second through hole and is connected to another metal resonant sheet.