Electrical Connector Grounding Structure for High-Speed Shielding
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Solution Overview
Problem
Existing electrical connectors lack sufficient shielding to maintain signal integrity during high-speed signal transmission.
Innovation Solution
The electrical connector design includes a terminal module with conductive terminals and ground sheets featuring elastic contact arms and grounding elastic arms that form double contacts with ground conductive pads of a mating module, enhancing the grounding structure's reliability and shielding effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a ground sheet connects all first ground terminals and all second ground terminals in series, then the ground shielding effect is improved, but the contact reliability with the mating module remains insufficient
Solution Approach 1:
The ground terminal is segmented into multiple functional parts: a fixing portion for mounting, an elastic contact arm with contact portion for mating module contact, and a tail portion for circuit board connection. This segmentation allows each part to optimize its specific function, improving overall contact reliability while maintaining shielding effectiveness.
Solution Approach 2:
The grounding mechanism transitions from a single-plane connection to a multi-dimensional contact system. The elastic contact arm extends in multiple directions, creating contact points at different spatial positions (contact portion with mating module, abutting portion with ground conductive pad), thereby enhancing contact reliability through dimensional distribution.
2Reliability
If the first contact portion of the first elastic contact arm is spaced apart from the first abutting portion of the first grounding elastic arm, then double contacts are formed improving reliability, but the device complexity increases
Solution Approach 1:
The ground terminal and ground sheet are merged into an integrated assembly where the ground terminal's elastic contact arm works in conjunction with the ground sheet's grounding elastic arm. This merging creates a coordinated double-contact system that improves reliability while avoiding the complexity of completely separate components.
Solution Approach 2:
The grounding elastic arm of the ground sheet is inserted into the through hole defined by the elastic contact arm of the ground terminal, creating a nested structure. This nesting arrangement enables the double-contact mechanism while maintaining a compact form factor and reducing overall structural 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
This configuration improves contact reliability and shielding, resulting in enhanced signal integrity and reduced external interference.
Implementation Method 1
the first elastic contact arm includes a first contact portion protruding into the first mating slot... the first grounding elastic arm is at least partially inserted into the first through hole... the first contact portion of the first elastic contact arm of the first ground terminal and the first abutting portion of the first grounding elastic arm are configured to be in contact with a first ground conductive pad of the first mating module
Data Source
AI summary
An electrical connector includes an insulating body and a first terminal module. The first terminal module includes a first insulating block, a number of first conductive terminals and a first ground sheet. Each first conductive terminal includes a first elastic contact arm having a first contact portion. The first conductive terminals include a first differential signal terminal, a first ground terminal and a second ground terminal. The first elastic contact arm of the first ground terminal defines a first through hole. The first ground sheet includes a first grounding elastic arm inserted into the first through hole. The first grounding elastic arm includes a first abutting portion. The first contact portion of the first ground terminal and the first abutting portion of the first grounding elastic arm are configured to be in contact with a first ground conductive pad of a first mating module.