Z-Shaped Grounding Contact for Cable Connector Cross-Talk
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Solution Overview
Problem
High-speed signal transmission cable connector assemblies experience cross-talk issues, particularly around the aluminum foil area, due to the smaller profile design of existing connectors.
Innovation Solution
A cable connector assembly with an insulative housing featuring a Z-shaped grounding contact configuration that extends beyond the rear ends of other contacts and includes soldering portions to effectively reduce cross-talk by isolating signal transmission lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the profile of the cable connector assembly is made smaller, then the compactness is improved, but cross-talk occurs between the cable and the contacts
Solution Approach 1:
The grounding contact extends in the front-to-back direction (length dimension) beyond the rear ends of other contacts, creating a dimensional extension that provides electrical isolation without increasing the connector's width or height. This allows maintaining a compact profile while eliminating cross-talk through extended grounding in the mating direction.
Solution Approach 2:
The extended grounding contact acts as an intermediary element between the signal contacts and the cable's aluminum foil shielding. By extending the grounding contact to contact the front end of the aluminum foil, it creates an intermediate electrical path that isolates high-speed signal contacts from electromagnetic interference, preventing cross-talk while maintaining compact dimensions.
2Object-generated harmful factors
If the grounding contact is extended to isolate signal lines, then cross-talk is reduced, but the device complexity increases
Solution Approach 1:
The grounding contact is merged with the existing contact structure in the insulative housing, sharing the same mounting locations and electrical connection methods. This integration allows the grounding function to be added without requiring separate components or complex assembly procedures, thus reducing the increase in device complexity while achieving effective cross-talk isolation.
Solution Approach 2:
The extended grounding contact serves multiple functions: it provides electrical isolation for high-speed signal contacts, creates a grounding path to the cable shielding, and maintains structural integration with the insulative housing. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving cross-talk reduction.
Data Source
AI summary
A cable connector assembly comprises an insulative housing, a plurality of first contacts and second contacts, a cable electrically connected with the contacts, a metallic shell enclosing the insulative housing. The first contacts are received in the first tongue, and the second contacts are held in the second tongue, the second contacts have a grounding contact in the middle thereof. The cable has an aluminum foil, and a front part of the aluminum foil is stripped away. The grounding contact has an extending configuration extending beyond back ends of other contacts along a front to back direction and a pair of soldering portions on both sides of the extending configuration, the extending configuration has a Z-shaped cross-section and extends rearwards to a front end of the aluminum foil.