Cavity Resonator Lug Mounting for Safer Tuning Space
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Solution Overview
Problem
Existing cavity filters face issues with insufficient tuning space, leading to potential back-out or over-insertion of tuning screws, which compromises product performance and safety, and lack of consistent assembly quality.
Innovation Solution
A resonator design featuring connecting lugs on the resonant rod's outer side with fixing members outside the inner cavity, allowing ample tuning space and stable connection, combined with an annular protrusion for enhanced stability and electromagnetic field distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the resonant rod has a through-hole at its bottom with a fixing screw passing through it, then the resonant rod can be secured to the support base, but the tuning space is insufficient leading to potential back-out or over-insertion of tuning screws
Solution Approach 1:
The resonant rod is divided into functional segments: the main body containing the inner cavity for tuning operations, and separate connecting lugs for fixation. This segmentation allows the fixing screw to engage with the connecting lugs rather than passing through the main body, thereby preserving adequate tuning space within the inner cavity while maintaining secure attachment to the support base.
Solution Approach 2:
The connecting lugs act as intermediary elements between the resonant rod's main body and the fixing screw. By providing dedicated attachment points on the outer side of the main body, the connecting lugs enable secure fixation without requiring the fixing screw to penetrate the inner cavity, thus resolving the conflict between secure mounting and adequate tuning space.
2Ease of manufacture
If the fixing screw passes through the resonant rod's inner cavity, then the resonant rod can be fixed, but the assembly quality is inconsistent and safety is compromised
Solution Approach 1:
The resonant rod is segmented into the main body and separate connecting lugs positioned on its outer side. This segmentation enables the fixing screw to attach to the connecting lugs without penetrating the inner cavity, ensuring consistent assembly quality through standardized lug interfaces while maintaining safety by preserving the integrity and tuning space of the inner cavity.
Solution Approach 2:
The connecting lugs serve as intermediary attachment points that eliminate the need for the fixing screw to pass through the inner cavity. This intermediary structure ensures consistent assembly by providing dedicated, standardized fixing points while enhancing safety by keeping the fixation mechanism separate from the resonant cavity interior.
3Device complexity
If the resonant rod lacks external connecting structures, then the structure is simpler, but the tuning space is reduced and safety is compromised
Solution Approach 1:
The connecting lugs are positioned specifically on the outer side of the resonant rod's main body, creating localized attachment points that do not interfere with the inner cavity. This local addition of structural elements provides the necessary fixing capability while preserving the simplicity and integrity of the overall resonant rod structure and maintaining adequate tuning space.
Data Source
AI summary
Embodiments of the present disclosure disclose a filter and a resonator including a housing, a cover plate, a resonant rod, and fixing members. The housing has a resonant cavity. The cover plate is connected to the housing. The resonant rod is disposed within the resonant cavity. The resonant rod includes a main body and connecting lugs arranged on the outer side of the main body. The main body has an inner cavity. Each connecting lug is provided with a connecting through-hole. Threaded holes are formed at the bottom of the resonant cavity. Fixing members passes through the connecting through-hole and extends into the threaded holes to connect the resonant rod to the housing. The connecting lugs position the fixing members outside the inner cavity, reserving sufficient space for the inner cavity, ensuring ample adjustment space during tuning of the resonator, improving its safety, and effectively reducing tuning power consumption.