High-Density Electrical Connector with Ground Shielding
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Solution Overview
Problem
Backplane connector systems face challenges in increasing terminal density and operating speed while preventing undesirable signal mode propagation as electronic components become more complex and compact.
Innovation Solution
The development of an electrical connector system with a center housing and end housings that define electrical contact channels on multiple sides, allowing for high-density differential pairs of electrical contacts with ground shielding and dielectric fillers to encapsulate connector pairs, preventing signal mode propagation issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the spacing between electrical terminals is reduced to increase terminal density, then the number of electrical terminals per unit area increases, but signal mode propagation issues worsen
Solution Approach 1:
Ground shielding structures are introduced as intermediary elements between adjacent differential pairs of electrical contacts. These ground shields act as mediators that block electromagnetic field coupling between neighboring signal pairs, preventing crosstalk and unwanted signal mode propagation while allowing the electrical terminals to be spaced closer together for higher density.
Solution Approach 2:
The connector housing is segmented into multiple sections, with ground shielding structures positioned between adjacent differential pairs. This segmentation divides the electromagnetic environment into isolated zones, confining signal fields within each differential pair and preventing interference with adjacent pairs, thereby enabling higher terminal density without signal integrity degradation.
2Quantity of substance
If electronic components are made more compact to fit more components in less space, then component density increases, but signal integrity deteriorates
Solution Approach 1:
Ground shielding structures serve as intermediary elements that maintain signal integrity in compact configurations. By positioning ground shields between adjacent differential pairs, the system preserves electromagnetic field containment even when components are densely packed, preventing crosstalk and maintaining reliable signal transmission despite reduced spacing.
Solution Approach 2:
The connector employs local quality enhancement by applying ground shielding specifically at critical interfaces between adjacent differential pairs. Rather than uniformly treating the entire connector, ground shields are strategically positioned where electromagnetic interference is most likely to occur, maintaining signal integrity at high-density locations while allowing flexibility in other areas.
3Quantity of substance
If the number of electrical terminals is increased in backplane connector systems, then connectivity capacity improves, but device complexity increases
Solution Approach 1:
Multiple functional elements are merged into an integrated connector system. The housing, electrical contacts, ground shielding structures, and dielectric fillers are combined into a unified assembly that provides high-density connectivity with built-in signal integrity protection. This merging reduces the need for separate components and simplifies the overall system architecture despite the increased number of terminals.
Solution Approach 2:
The connector system incorporates multi-functional elements that serve multiple purposes. Ground shielding structures simultaneously provide electromagnetic shielding, mechanical support, and structural definition for contact positioning. Dielectric fillers provide both electrical isolation and mechanical spacing. This multi-functionality reduces the total component count and simplifies the system despite supporting a high number of electrical terminals.
Data Source
AI summary
An electrical connector system may include a center housing that defines a plurality of first electrical contact channels on a first side face of the center housing and a plurality of second electrical contact channels on a second side face of the center housing. A first array of electrical contacts is positioned substantially within the plurality of first electrical contact channels on the first side face of the center housing. A second array of electrical contacts is positioned substantially within the plurality of second electrical contact channels on the second side face of the center housing. The first array of electrical contacts is paired with a third array of electrical contacts to form a first plurality of differential pairs of electrical contacts. The second array of electrical contacts is paired with a fourth array of electrical contacts to form a second plurality of differential pairs of electrical contacts.