Shielded Electrical Connector Grounding Arms EMI Reduction
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Solution Overview
Problem
Existing electrical connectors face increasing signal interference issues as high-frequency transmission demands grow, necessitating an improved anti-EMI solution.
Innovation Solution
The electrical connector features an insulative housing with conductive terminals, a metal shell, and grounding members with contacting arms that protrude into a mating cavity, providing pre-pressure and elastic deformation to enhance electromagnetic shielding and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding member is disposed between two groups of conductive terminals and spaced from insulating blocks, then electromagnetic interference of the conductive terminals is prevented, but signal interference between terminals becomes increasingly serious with high-frequency transmission needs
Solution Approach 1:
The grounding member is divided into multiple contacting arms (at least two) that are distributed across different regions of the insulative housing. Each contacting arm independently contacts the housing to form multiple grounding points, creating a segmented grounding system that provides more comprehensive electromagnetic shielding and reduces signal interference between terminals.
Solution Approach 2:
The grounding member extends in multiple spatial dimensions with contacting arms projecting from the body portion in different directions. This multi-dimensional configuration ensures broader coverage of the grounding function throughout the connector structure, enhancing EMI protection and signal integrity.
2Object-affected harmful factors
If grounding members with contacting arms are assembled on the outside of insulative housing, then electromagnetic shielding is enhanced, but contact stability may be compromised without pre-pressure
Solution Approach 1:
The contacting arms are pre-formed with elastic deformation characteristics and are configured to contact the insulative housing with predetermined pre-pressure before assembly is completed. This preliminary action ensures stable electrical contact and reliable grounding from the outset, preventing contact instability.
Solution Approach 2:
The contacting arms utilize elastic deformation as a key parameter change mechanism. The arms are designed with specific elastic properties that allow them to deform and maintain consistent contact pressure with the housing, ensuring stable grounding connection while accommodating manufacturing tolerances and assembly variations.
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
This configuration effectively reduces electromagnetic interference and improves signal integrity by ensuring stable contact and better masking effects, enhancing the overall performance of the electrical connector.
Implementation Method 1
the contacting portion of the grounding member protrudes into the mating cavity and the connecting portion abuts against the top surface of the rib to form a certain pre-pressure to the contacting arm
Data Source
AI summary
An electrical connector includes an insulative housing, a plurality of conductive terminals retained in the insulative housing and two grounding members. The insulative housing defines an upper sidewall, a lower sidewall and two end walls connected to both ends of the upper and lower sidewalls to form a mating cavity. Each grounding member defines a body portion fixed to the outside of the insulative housing and a plurality of contacting arms. Each contacting arm defines a connecting portion extending forwardly from the body portion and a contacting portion bent inwardly from the connecting portion, and the upper and lower sidewalls of the insulative housing defines a plurality of channels and a plurality of ribs, the contacting portion of the grounding member protrudes into the mating cavity and the connecting portion abuts against the top surface of the rib to form a certain pre-pressure to the contacting arm.