Integrated Cavity Filter Structure for Capacitive Cross-Coupling
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Solution Overview
Problem
Existing cavity filters face challenges in manufacturing complexity due to the need for separate components to implement capacitive cross-coupling, and there is a need to suppress magnetic coupling while enhancing electric coupling.
Innovation Solution
A cavity filter design that integrates resonant bars, a vertical post for a notch, and a horizontal portion through injection molding, allowing capacitive cross-coupling without additional components, and adjusts coupling type based on assembly tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate components are used to implement capacitive cross-coupling, then the coupling design is achieved, but the manufacturing complexity increases
Solution Approach 1:
The patent integrates the resonant bar and vertical post into a single unified component through integral formation, eliminating the need for separate components to implement capacitive cross-coupling. This merging of functions into one component achieves the coupling design while simplifying manufacturing processes.
Solution Approach 2:
The integrated resonant bar and vertical post structure serves multiple functions simultaneously: it provides resonance functionality through the resonant bar while also creating the capacitive cross-coupling effect through the vertical post extension. This multi-functionality eliminates the need for separate dedicated coupling components.
2Reliability
If separate components are used to implement capacitive cross-coupling, then the coupling design is achieved, but the assembly process becomes more complex
Solution Approach 1:
By integrating the resonant bar and vertical post into a single component, the patent eliminates multiple assembly steps. The unified structure is installed as one piece, significantly simplifying the assembly process while maintaining the capacitive cross-coupling design functionality.
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
Facilitates easy manufacturing and consistent frequency filtering characteristics by eliminating separate component assembly, enabling strong electric coupling and suppressing magnetic coupling.
Implementation Method 1
one side cavity and the other side cavity required to have capacitive cross-coupling design
Implementation Method 2
designed to suppress magnetic coupling and excite electric coupling relatively strongly
Implementation Method 3
resonant bars respectively provided at centers of one side cavity and the other side cavity
Data Source
AI summary
The present invention relates to a cavity filter and a method of manufacturing the same, and particularly, to a cavity filter including one side cavity and the other side cavity required to have capacitive cross-coupling design, resonant bars respectively provided at centers of one side cavity and the other side cavity, and a vertical post for a notch extending from any one of the resonant bars and extending in a vertical direction in an inner wall that is a boundary between one side cavity and the other side cavity, in which the resonant bar, which is connected to the vertical post for a notch among the resonant bars, is integrated with the vertical post for a notch, thereby providing an advantage of easily manufacturing the cavity filter and easily performing capacitive cross-coupling design.