Deformable End Cover Tuning for Clean Cavity Filters
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Solution Overview
Problem
During the installation and adjustment of cavity filters, metal debris and foreign impurities are easily introduced into the resonant cavity, affecting the filtering performance.
Innovation Solution
A deformable adjusting end cover is used to adjust the volume of the resonant cavity, ensuring cleanliness by preventing the entry of debris and impurities, and allowing for parameter adjustments that enhance the filter's adaptability to multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an adjusting screw is inserted deep into the resonant cavity to adjust filtering performance, then the parameter adjustment capability is improved, but metal debris and foreign impurities are introduced into the resonant cavity affecting filtering performance
Solution Approach 1:
The adjusting screw is extracted from the resonant cavity and replaced by a deformable adjusting end cover that modifies the cavity volume from the exterior. This removes the source of contamination (the screw) while preserving the adjustment function through an alternative mechanism that does not require internal insertion.
Solution Approach 2:
The deformable adjusting end cover acts as an intermediary element between the external adjustment mechanism and the resonant cavity. It transmits the adjustment action (through deformation) to modify the cavity volume without direct mechanical insertion into the cavity, thereby preventing debris introduction.
2Ease of operation
If a traditional adjusting screw is used inside the resonant cavity, then the filtering performance parameters can be adjusted, but the cleanliness of the resonant cavity is compromised
Solution Approach 1:
The adjustment mechanism is extracted from the internal cavity environment and relocated to the external adjusting end cover. The deformable cover transfers the adjustment action through its deformation to modify cavity volume, enabling easy operation while maintaining cavity cleanliness and reliability.
Solution Approach 2:
The traditional mechanical screw insertion system is replaced with a deformation-based mechanism. The adjusting end cover deforms under external adjustment forces to change cavity volume, substituting direct mechanical insertion with a cleaner mechanical action that preserves cavity integrity.
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 solution maintains the cleanliness of the resonant cavity, improving the filter's parameter adjustment range and adaptability to various frequency bands, thereby enhancing communication quality.
Implementation Method 1
the adjusting end cover has a deformable region; a driving assembly, including a driving body, where the driving body is connected to a side of the deformable region away from the resonant cavity and operatively drives the deformable region to move toward and away from the resonator
Data Source
AI summary
The embodiments of the disclosure discloses an cavity filter in which a sealed resonant cavity is formed by using an adjusting end cover and a body, and a positional relationship between the resonator and the adjusting end cover is changed by using a deformable adjusting end cover. Therefore, during the adjustment of the performance parameters of the cavity filter, the resonant cavity may be kept clean, so as to prevent metal debris or external dust from entering the resonant cavity and affecting the filtering performance of the cavity filter. The adjusting end cover is configured to be driven by the driving body to produce a deformation relative to the resonator. The parameter adjustment range of the cavity filter is improved, so that the cavity filter may adapt to more frequency bands, thereby improving the communication quality of the communication device.