Ground Shield Layout Between Contact Columns for Crosstalk Control
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Solution Overview
Problem
The increasing complexity of electronic components and reduced spacing between electrical terminals in connectors necessitates improved shielding to maintain signal integrity and minimize crosstalk, particularly in connectors with higher pin densities and reduced footprints.
Innovation Solution
Incorporation of ground shields positioned between columns of contacts, utilizing planar members with voids and mounting members to provide electrical coupling through physical contact or capacitive coupling, thereby reducing crosstalk and enhancing signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the spacing between electrical terminals is reduced to increase pin density, then the connector footprint is reduced, but crosstalk between adjacent contacts increases
Solution Approach 1:
Ground shields are introduced as intermediary elements positioned between adjacent columns of contacts. These shields act as mediators that block electromagnetic field coupling between neighboring signal contacts, thereby reducing crosstalk while allowing the contacts to remain in close proximity for high pin density
Solution Approach 2:
The connector is segmented into isolated contact columns by inserting ground shields between them. This segmentation divides the continuous electromagnetic environment into separate zones, preventing interference between adjacent signal pairs while maintaining compact spacing
2Object-affected harmful factors
If ground shields are added between columns of contacts to reduce crosstalk, then signal integrity is improved, but device complexity increases
Solution Approach 1:
Multiple functions are merged into the ground shields: they provide crosstalk shielding, establish ground reference planes, and create physical separation between contact columns. This consolidation achieves multiple shielding objectives with a single component rather than multiple separate elements
Solution Approach 2:
The ground shields serve multiple purposes simultaneously: electromagnetic shielding, ground reference provision, and structural spacing maintenance. This multi-functionality reduces the need for additional dedicated components, offsetting the complexity increase from adding the shields themselves
3Object-affected harmful factors
If ground shields are positioned between all columns of contacts, then shielding effectiveness is maximized, but manufacturing cost increases
Solution Approach 1:
Ground shields are selectively positioned only between columns containing signal contacts that are susceptible to crosstalk, rather than uniformly between all columns. This localized approach provides shielding where it is most needed while reducing the total number of shields required, thereby lowering manufacturing costs
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 ground shields effectively reduce crosstalk and maintain signal integrity by providing electrical shielding through direct contact or capacitive coupling, ensuring consistent impedance levels and minimizing electromagnetic interference (EMI) leakage.
Implementation Method 1
The ground connection with the ground shields can be made through direct physical contact, through capacitive coupling or through both
Data Source
AI summary
An electrical connector which controls cross talk and signal radiation. The electrical connector includes columns of contacts having signal contacts and ground contacts. Ground shields are positioned between the columns of contacts. The ground shields have planar members with mating ends and mounting ends. The planar members have surfaces which are configured to be electrically coupled to ground members on a mating connector. Voids are provided in the planar members. Mounting members extend from the mounting ends of the planar members. The mounting members are configured to cooperate with the ground contacts provided in the columns of contacts.