High-Frequency Connector Sealing Structure for RF Leakage Control
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Solution Overview
Problem
Current high frequency CATV network connectors, such as Type F connectors, suffer from RF leakage and reliability issues, especially at higher frequencies and in outdoor applications, due to inconsistent sealing and robustness concerns.
Innovation Solution
A high frequency electrical connector design featuring a conductive shell with a sealing member and a coupling member for mechanical engagement, providing a primary and secondary grounding path, and a sealing ring for environmental sealing, which enhances RF performance and mechanical strength, suitable for both indoor and outdoor use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Type F connectors are used for CATV networks, then the connectors can be manufactured and deployed, but they exhibit RF leakage and inconsistent sealing especially at higher frequencies and in outdoor applications
Solution Approach 1:
The connector is divided into multiple functional segments: a sealing member (O-ring) that provides environmental sealing, a coupling member that provides mechanical engagement, and a conductive shell that provides RF shielding. This segmentation allows each component to independently address specific problems - the sealing member prevents RF leakage paths, the coupling member ensures consistent mechanical connection, and the conductive shell provides RF shielding, collectively resolving the RF leakage and consistency issues of legacy Type F connectors
Solution Approach 2:
The sealing member acts as an intermediary element between the conductive shell and the environment, creating a sealed barrier that prevents RF leakage. The coupling member serves as an intermediary that mediates the mechanical connection between connectors, ensuring consistent engagement force and positioning. These intermediary components directly address the harmful RF leakage while maintaining system functionality
2Reliability
If legacy Type F connectors are used, then the connectors can be installed, but they show robustness and reliability concerns particularly when not properly tightened
Solution Approach 1:
The coupling member is pre-configured with engagement features that guide proper installation and ensure consistent mechanical engagement. The sealing member is pre-positioned to engage automatically when connectors are mated, eliminating the need for precise manual positioning. This preliminary configuration reduces installation sensitivity while maintaining robustness
Solution Approach 2:
The sealing member provides a compliant element that compensates for minor variations in installation torque and connector positioning. The O-ring's elasticity allows it to maintain sealing pressure despite slight misalignments or insufficient tightening, providing a cushioning effect that prevents connection failures from minor installation errors
3Reliability
If connectors are designed for high frequency performance, then RF performance improves, but the sealing and mechanical engagement become more complex
Solution Approach 1:
The sealing member is implemented as a flexible O-ring that can deform to accommodate manufacturing tolerances and installation variations. This flexible sealing approach provides reliable environmental sealing without requiring complex rigid sealing structures, thus maintaining simplicity while achieving high frequency RF performance through consistent sealing
Data Source
AI summary
An electrical connector that has a conductive shell supporting at least one signal contact therein and that has a front end for mating with a mating connector and a back end opposite the front end for electrically connecting to a coaxial cable. A ground connection is located inside of the conductive shell. A coupling member is rotatably coupled to the conductive shell and has an engagement feature for mechanically engaging a support panel associated with the mating connector. A sealing member is disposed on the conductive shell that is configured to provide an environmental seal between the conductive shell and the support panel when the conductive shell is mated with the mating connector.