Electrical Connector Ground Loop Structure for EMI Shielding
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Solution Overview
Problem
Existing electrical connectors, such as high-frequency backplane connectors, face issues with electromagnetic interference (EMI) due to crosstalk or noise, despite the use of grounding terminals for shielding, and their overall transmission performance has not reached the desired level.
Innovation Solution
An electrical connector design featuring a conductive body with a slot and a terminal module including an insulating block, signal terminals, and a grounding piece with a ground terminal and contact portion, which, when mated with a connector, forms a stable loop to improve shielding by contacting a ground pin, enhancing the connector's shielding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If grounding terminals are used between signal terminals to shield different signal terminals, then electromagnetic interference is reduced, but the overall connector transmission performance does not reach the expected effect
Solution Approach 1:
The grounding system is segmented into multiple independent grounding terminals positioned between signal terminals, with each grounding terminal providing localized shielding. The conductive body is also segmented into multiple grounding elements that can be independently configured to optimize shielding at different locations within the connector assembly.
Solution Approach 2:
Different regions of the connector are provided with different grounding configurations based on local EMI requirements. The conductive body includes grounding elements at specific locations (such as at the ends and between signal terminals) rather than uniform grounding throughout, allowing optimized shielding performance where most needed while maintaining signal integrity in other areas.
2Object-affected harmful factors
If multiple grounding elements are added to improve shielding, then electromagnetic interference is reduced, but device complexity increases
Solution Approach 1:
Multiple grounding functions are merged into integrated structures. The conductive body serves both as a structural support and as a grounding element. Grounding terminals are integrated into the terminal module assembly, eliminating the need for separate grounding components and reducing overall complexity while maintaining effective shielding.
Solution Approach 2:
The conductive body is designed to perform multiple functions: providing mechanical support for the terminal module, establishing electrical connection between grounding terminals, and serving as a grounding shield itself. This multi-functionality reduces the number of separate components needed and simplifies the overall connector structure.
Data Source
AI summary
An electrical connector includes a conductive body, a terminal module and a grounding element. The conductive body includes a mating cavity and a slot for fixing the grounding element. The terminal module includes an insulating block, a plurality of signal terminals and a grounding piece mounted to the insulating block. The grounding piece includes a ground terminal. The ground terminal includes a ground contact portion at least partially located in the mating cavity. The grounding element includes a ground mating portion at least partially located in the mating cavity. The ground contact portion and the ground mating portion are adapted to be in contact with a same ground pin of a mating connector. As a result, a stable loop can be formed and the shielding performance of the electrical connector is improved. Besides, an electrical connector assembly having the electrical connector is disclosed.