Cable Header Connector With Integrated Ground Shield
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Solution Overview
Problem
Existing electrical connectors face issues with signal loss, cross-talk, and complex termination processes due to improper shielding and cable handling, leading to degraded performance, especially in high-speed differential communication systems.
Innovation Solution
A cable header connector design featuring a contact sub-assembly with signal contacts held by an interference fit in contact channels and a ground shield with positioning tabs, providing electrical and mechanical coupling to a metal holder, which ensures precise positioning and shielding of signal wires, reducing noise and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shielding is added to reduce interference between contacts, then signal integrity is improved, but cable termination becomes more complex and time-consuming
Solution Approach 1:
The patent combines the ground shield and drain wire termination into a single integrated structure. The ground shield is directly formed as part of the connector housing, eliminating the need for separate drain wire soldering operations. This merging of functions reduces termination complexity while maintaining shielding effectiveness for signal integrity.
Solution Approach 2:
The ground shield is designed to automatically position and terminate with the cable shield during cable insertion. The structure includes features that guide the cable shield into proper alignment with the ground shield, enabling self-alignment and self-termination without requiring complex positioning or manual intervention, thus reducing termination complexity while ensuring proper shielding.
2Productivity
If cable density is increased to improve throughput, then system throughput is improved, but signal degradation and cross-talk increase
Solution Approach 1:
The patent implements localized shielding structures around each cable assembly and differential pair. Each ground shield is positioned to provide targeted electromagnetic shielding for adjacent signal conductors, reducing cross-talk between closely spaced cables. This local quality approach allows high cable density while maintaining signal quality through focused interference reduction at critical locations.
Solution Approach 2:
The ground shield acts as an intermediary element between adjacent signal cables. It provides a grounded barrier that intercepts and redirects electromagnetic fields, preventing direct coupling between neighboring differential pairs. This intermediary structure enables increased cable density by mediating the electromagnetic interaction between closely spaced conductors, thereby maintaining signal quality.
3Reliability
If drain wires are soldered to grounded components, then electrical connection is achieved, but termination becomes time-consuming and difficult
Solution Approach 1:
The patent replaces the traditional soldering process with a mechanical compression connection system. The ground shield and associated contacts are designed to establish electrical connection through controlled compression forces when the cable is terminated. This mechanical substitution eliminates the time-consuming soldering operation while maintaining reliable electrical connection between drain wires and grounded components.
Solution Approach 2:
The termination structure is designed to automatically establish electrical connection between drain wires and grounded components during cable insertion. The compression contacts and grounding paths are configured to self-align and self-connect without requiring manual soldering operations. This self-service mechanism reduces termination time while ensuring reliable electrical connection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces signal degradation and noise, simplifies the termination process, and maintains signal integrity by ensuring consistent and secure electrical connections, enhancing the performance and density of high-speed differential connectors.
Implementation Method 1
The signal contacts are laser welded to the signal wires of the cable at terminating ends of the signal contacts after being positioned in the contact channels.
Data Source
AI summary
A cable header connector includes a cable including a pair of signal wires, a contact sub-assembly terminated to the cable and a ground shield providing electrical shielding for the contact sub-assembly. The contact sub-assembly has a mounting block having contact channels therein. The contact sub-assembly has a pair of signal contacts each received in corresponding contact channels and held in the contact channels by an interference fit. The contact channels receive corresponding signal wires of the cable and position the signal wires in position adjacent to the corresponding signal contacts. The signal contacts are laser welded to the signal wires of the cable at terminating ends of the signal contacts after being positioned in the contact channels.