Contact Sleeve Geometry for Stable RF Connector Shielding
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Solution Overview
Problem
Conventional connectors are not suitable for achieving high data rates and maintaining signal quality, especially for RF signal transmission above 5 GHz, due to mechanical tolerances and abrasion issues, which lead to contact losses and poor shielding.
Innovation Solution
A contact sleeve with a lateral inner contact surface and a face-sided outer contact surface is inserted into a recess of an electrical apparatus, transforming radial contacts into axial contacts, reducing abrasion, and improving precision and electrical properties, allowing for enhanced RF signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional connectors are used for board-to-board connections, then mechanical connection is achieved, but signal quality and data rate are insufficient for high-frequency applications
Solution Approach 1:
A contact sleeve is introduced as an intermediary component between the plug-in connector and the housing. This sleeve provides a dedicated RF-optimized contact path with controlled impedance, acting as a mediator that transforms the conventional mechanical connection into a high-frequency suitable electrical connection, enabling both mechanical stability and signal integrity for frequencies above 5 GHz
Solution Approach 2:
The invention replaces the conventional direct mechanical connector interface with a hybrid system that uses the contact sleeve to establish an optimized electrical pathway. The sleeve's coaxial structure and precise dimensional tolerances substitute for the inadequate signal transmission properties of standard mechanical connectors, enabling high-frequency operation while maintaining mechanical connection
2Ease of operation
If mechanical tolerances and frequent mating cycles occur, then ease of operation is improved, but contact losses and shielding deterioration occur
Solution Approach 1:
The contact sleeve is designed with built-in compensation mechanisms that anticipate and cushion against the effects of mechanical tolerances and wear from frequent mating cycles. The sleeve's geometry and material properties provide a tolerance buffer that maintains stable electrical contact even when connectors are repeatedly connected and disconnected, preventing contact losses before they occur
Solution Approach 2:
The invention changes the critical contact parameters by using the contact sleeve to establish precise dimensional relationships and contact pressures. The sleeve's controlled impedance and geometric parameters remain stable despite external mechanical variations, maintaining reliable electrical connection through parameter optimization that compensates for operational wear and tolerance accumulation
Data Source
AI summary
Contact sleeve (13) for insertion into a recess (12) of a housing (11) of an electrical apparatus (5), comprising a lateral inner contact surface (21) and a face sided outer contact surface (17). The inner contact surface (21) is configured to make an electrical contact with an outer conductor (4) of an electrical plug-in connector (7). The outer contact surface (17) is configured to make an electrical contact with the housing (11) of the electrical apparatus (5) via a stop surface (16) inside the recess (12).