Cavity Filter Tuning Screw Elastic Deformation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cavity filters in RF communication systems have a large occupied space above the cover plate due to the need for a nut and washer with the tuning screw, making installation complicated and costly.
Innovation Solution
A cavity filter design that integrates a resonance rod with the cover plate and uses a supporting member to secure the tuning screw, allowing for elastic deformation of the resonance rod to adjust RF parameters, eliminating the need for a nut and washer and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nut and washer are used with the tuning screw for securing, then the tuning screw can be firmly fixed, but the occupied space above the cover plate increases and the installation becomes complicated
Solution Approach 1:
The patent combines the supporting member and fixing function into a single integrated component. The supporting member is directly mounted to the cover plate and provides both structural support and fixing capability, eliminating the need for separate nuts and washers. This merging of functions reduces the number of parts and simplifies the installation process while maintaining reliable fixation of the tuning screw.
2Reliability
If a nut and washer are used with the tuning screw, then secure fixation is achieved, but the material cost and processing cost increase
Solution Approach 1:
The supporting member integrates multiple functions (support, positioning, and fixing) into a single component that can be manufactured as one piece. This eliminates the need to manufacture and assemble multiple separate parts (tuning screw, nut, washer), thereby reducing material costs, processing costs, and assembly operations while ensuring secure fixation.
3Adaptability or versatility
If the resonance rod is made elastic to enable tuning, then RF parameters can be adjusted, but the structural complexity increases
Solution Approach 1:
The patent utilizes elastic deformation of the resonance rod as a tuning mechanism. By applying force to the resonance rod, its physical parameters (length, shape) change temporarily, which adjusts the resonant frequency and RF parameters of the cavity filter. This parameter-based tuning approach maintains a simple overall structure while achieving the desired adaptability.
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
This design reduces the overall space requirements, simplifies installation, and enhances the tunability and performance of the cavity filter by utilizing the elastic deformation of the resonance rod to adjust RF parameters.
Implementation Method 1
The supporting member supports the tuning screw to push the bottom end of the resonance rod along an axial direction of the resonance rod, making the resonance rod undergo an elastic deformation so as to adjust the RF parameters of the cavity filter
Data Source
AI summary
A cavity filter and a RF communication device including the cavity filter are disclosed. The cavity filter includes a cavity body, a cover plate, a resonance rod, a tuning screw, and a supporting member. The cover plate caps the cavity body to form a resonance cavity. The resonance rod is a tube with an opening at one end, where the opening end is combined with the cover plate or the cavity body. The supporting member is mounted to the cover plate or the cavity body to further secure the tuning screw to the resonance rod, and pushes the tuning screw along an axial direction of the resonance rod against the bottom end of the resonance rod, so as to make the resonance rod undergo an elastic deformation and thus adjust the RF parameters of the cavity filter.