Preassembled Crosstalk Shielding for High-Speed Cable Connectors
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Solution Overview
Problem
Existing high-speed electrical connectors face challenges in assembling delicate cross-talk shields to the connector shell, particularly when terminating high-speed differential pairs of conductors, which leads to difficulties in isolating cross-talk effectively.
Innovation Solution
A preassembled crosstalk shield with mounting projections that engage with shield receiving recesses in the shell housing, providing a secure mechanical and electrical connection through an interference engagement with multiple points of contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cross talk shields are assembled to the connector shell in the field during conductor termination, then the connector can be assembled with proper EMI shielding, but the assembly process becomes difficult and problematic due to the delicate size of the differential pairs and shields
Solution Approach 1:
The cross talk shields are preassembled to the connector shell before the conductors are terminated. The shields are attached to the shell using interference fits with the recesses, creating a stable assembly that eliminates the difficulty of field assembly while maintaining proper crosstalk isolation between differential pairs
2Object-affected harmful factors
If the cross talk shields are made small to match the differential pairs, then the EMI shielding effectiveness is improved, but the shields become delicate and difficult to assemble
Solution Approach 1:
The cross talk shields are nested within the connector shell, with each shield positioned in a corresponding recess. The shields are smaller than the shell interior to allow proper positioning and interference engagement, achieving effective crosstalk isolation while maintaining assembly feasibility through the nested configuration
3Stability of the object's composition
If interference engagement with multiple points of contact is used, then the mechanical and electrical connection stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The interference engagement system uses multiple discrete points of contact between the shields and recesses rather than continuous contact. Each projection engages with its corresponding recess at specific localized points, providing stable mechanical and electrical connection while allowing for reasonable manufacturing tolerances through the distributed nature of the engagement points
Data Source
AI summary
An assembly for terminating a high speed cable. The assembly includes a shell housing and preassembled crosstalk shield. The shell housing has a mating end and a conductor receiving end, One or more shield receiving recesses extend from the conductor receiving end toward the mating end. The preassembled crosstalk shield has mounting projections which are positioned in the one or more shield receiving recesses. The mounting projections and the one or more shield receiving recesses provide an interference engagement to provide a secure mechanical and electrical connection between the shell housing and the preassembled crosstalk shield.