Ground Shield Connector Layout for Crosstalk Reduction
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Solution Overview
Problem
Current electrical connectors experience severe signal interference, particularly near-end crosstalk, high-frequency resonance, and return loss, leading to poor signal integrity when mated with card-type connectors.
Innovation Solution
An electrical connector design featuring a housing with separated rows of terminals and a ground shield assembly, where the ground shield is positioned between the signal terminals and electrically connected to the ground layer, reducing signal interference by creating a conductive path with multiple contact points that mimic a total reflection boundary, thereby increasing the resonant frequency and improving signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If signal terminals of two rows are arranged close together to reduce connector size, then device compactness is improved, but near-end crosstalk and signal interference increase
Solution Approach 1:
A ground shield assembly is introduced as an intermediary element positioned between the signal terminals of the first and second rows. This ground shield includes a ground shield body and multiple ground contact pieces that make contact with ground terminals, creating a physical and electrical barrier that blocks electromagnetic interference and crosstalk between adjacent signal terminals while allowing the terminals to remain in a compact arrangement
2Reliability
If ground terminals are extended to provide better grounding, then signal integrity is improved, but device complexity increases
Solution Approach 1:
The ground shield assembly is segmented into multiple independent ground contact pieces (first, second, third, and fourth ground contact pieces) that can be separately positioned and connected to different ground terminals. This segmentation allows the grounding function to be distributed across multiple contact points, improving signal integrity through better grounding while maintaining a modular structure that does not significantly increase overall device complexity
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 interference and enhances high-frequency resonance, improving signal integrity by creating a conductive path with multiple contact points that increase the resonant frequency and facilitate noise flow into the ground layer.
Implementation Method 1
The ground shield assembly is in electrical contact with a corresponding ground terminal at at least one position of each of at least one ground terminal of the first row of terminals and/or the second row of terminals
Implementation Method 2
The ground shield assembly is adapted to be electrically connected to the ground layer
Data Source
AI summary
An electrical connector includes a housing, first and second rows of terminals arranged in the housing, and a ground shield assembly. The first and second rows of terminals are separated from each other and adapted to electrically connect with corresponding terminals of a mated electrical connector. The first and second rows of terminals each include a ground terminal connected to a ground layer of a circuit board and a signal terminal connected to a signal lead wire of the circuit board. The ground shield assembly is positioned between the signal terminal of the first row of terminals and the signal terminal of the second row of terminals and is electrically connected to the ground layer. The ground shield assembly is in electrical contact with a corresponding ground terminal at at least one position of each of at least one ground terminal of the first and/or second row of terminals.