Cable Header Connector Ground Bridge for Crosstalk Reduction
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Solution Overview
Problem
Existing electrical connectors face issues with signal loss and degradation due to cross-talk and insufficient performance as speed and density demands increase, with existing shielding solutions not effectively addressing interference and grounding issues.
Innovation Solution
A cable header connector design featuring a contact module with a support body and peripherally surrounding ground shield, including an electrically conductive ground bridge that interconnects adjacent cable assemblies via intercolumn bridges, ensuring comprehensive electrical shielding and reduced noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cable assemblies are placed in close proximity to increase connector density, then throughput of the electrical system is improved, but cross talk and signal degradation increase
Solution Approach 1:
A ground bridge structure is introduced as an intermediary element between adjacent cable assemblies. This ground bridge provides a low-impedance ground path that mediates the electromagnetic fields between closely spaced cables, reducing cross-talk while allowing the cables to remain in close proximity for high density connectivity.
Solution Approach 2:
The grounding system is segmented into multiple ground bridges positioned at intervals along the cable assemblies. Each ground bridge segment provides localized shielding and grounding, effectively reducing cross-talk between adjacent cables while maintaining overall system connectivity and high density.
2Reliability
If shielding is added to reduce interference between contacts, then signal integrity is improved, but the complexity and size of the connector increases
Solution Approach 1:
The ground bridge serves multiple functions simultaneously: it provides grounding for adjacent cable assemblies, reduces cross-talk through electromagnetic shielding, and maintains mechanical alignment between connectors. This multi-functionality reduces the need for separate shielding components, thereby reducing overall complexity.
Solution Approach 2:
The grounding and shielding functions are merged into a single ground bridge structure. Rather than using separate ground connections and shielding elements, the ground bridge combines both functions into one component, reducing the number of parts and simplifying the overall connector design.
3Productivity
If the number of cable assemblies in a single electrical connector is increased, then connector density is improved, but grounding and shielding effectiveness deteriorates
Solution Approach 1:
The grounding system is divided into multiple ground bridge segments positioned at regular intervals along the cable assemblies. This segmentation ensures that each cable assembly is independently grounded at multiple points, maintaining effective grounding and shielding even as the number of cable assemblies increases within the connector.
Solution Approach 2:
Ground bridges are positioned as intermediary elements between adjacent cable assemblies, providing localized grounding and shielding at critical interfaces. This intermediary grounding approach maintains effectiveness even in high-density configurations with many cable assemblies.
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 noise and crosstalk, enhances signal integrity, and maintains performance even at increased connector density without significant size increase, by providing continuous electrical shielding along signal paths and grounding all sections of the signal wires.
Implementation Method 1
a ground shield coupled to the contact sub-assembly, the contact sub-assembly having a pair of signal contacts extending between mating ends and terminating ends, the signal contacts being peripherally surrounded by the ground shield
Implementation Method 2
an electrically conductive ground bridge coupled to the support body; and the ground bridge includes intercolumn bridges, each intercolumn bridge arranged between two adjacent cable assemblies and engaging and electrically connected to the ground shield of each of its adjacent cable assemblies
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A cable header connector (100) comprises a contact module (300) having a support body (304) and a plurality of cable assemblies (140) held by the support body and arranged in a column. Each of the cable assemblies comprises a contact sub-assembly (144) configured to be terminated to a cable (102), and a ground shield (148) coupled to and providing electrical shielding for the contact sub-assembly. The contact sub-assembly has a pair of signal contacts (146) terminated to corresponding signal wires (104, 106) of the cable. An electrically conductive ground bridge (302) is coupled to the support body (142). The ground bridge includes intercolumn bridges (306) arranged between corresponding cable assemblies (140). The intercolumn bridges engage and are electrically connected to the ground shields of the corresponding cable assemblies on both sides of the intercolumn bridges, whereby the ground bridge electrically connects the cable assemblies engaged by the intercolumn bridges.