Electrical Connector Shield Structure for Cable Grounding and EMI Control
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Solution Overview
Problem
Existing electrical connector assemblies lack effective shielding measures at the connection between cables and high-speed terminals, leading to impaired signal transmission.
Innovation Solution
An electrical connector assembly design featuring a ground bar with bulged sections and a discrete metal shield member, where the bulged sections of the ground bar and metal shield member cooperate to surround the cable, providing enhanced shielding and grounding effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no shielding measures are taken at the cable connection, then the device complexity is reduced, but the signal transmission quality deteriorates due to interference
Solution Approach 1:
The shielding structure is divided into multiple segments: a metal shield member with a first bulged section, a ground bar with a second bulged section, and a cable shield layer. These segmented components work together to provide comprehensive shielding while maintaining structural flexibility and ease of assembly.
Solution Approach 2:
The ground bar acts as an intermediary component connecting the metal shield member to the ground terminal. The bulged sections of both the metal shield member and ground bar create an intermediate shielding zone that enhances the overall anti-interference effect while maintaining proper grounding.
2Ease of manufacture
If a simple ground terminal structure is used, then the manufacturing cost is reduced, but the grounding effectiveness is insufficient for high-speed signals
Solution Approach 1:
The ground bar features localized bulged sections that provide enhanced grounding capability at critical positions. This local enhancement of grounding quality ensures reliable signal reference for high-speed differential pairs without requiring complete structural redesign of the entire grounding system.
Solution Approach 2:
The grounding structure extends into the vertical dimension with stacked upper and lower ground terminal modules. This three-dimensional grounding arrangement provides multiple grounding paths and improved signal reference planes, enhancing grounding effectiveness for high-speed signals.
3Productivity
If the metal shield member is integrated with the ground terminal, then the assembly process is simplified, but the shielding effectiveness is reduced
Solution Approach 1:
The shielding system is segmented into distinct functional components: the metal shield member for electromagnetic shielding, the ground bar for grounding, and the ground terminal for electrical connection. This segmentation allows each component to optimize its specific function while maintaining ease of assembly through modular design.
Solution Approach 2:
The metal shield member is extracted as a separate component from the ground terminal assembly. This separation allows the metal shield member to be positioned optimally for maximum shielding effectiveness while the ground terminal maintains its grounding function, and both can be assembled independently to improve productivity.
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 design improves signal transmission performance by ensuring better anti-interference and grounding, conforming to high-speed standards like QSFP-DD with 50 Gbps or higher channel rates.
Implementation Method 1
the first bulged section and the second bulged section cooperate with each other to surround the cable in a circumferential direction
Implementation Method 2
each of the high-speed terminal modules including a plurality of ground terminals and differential pair terminals arranged alternately
Data Source
AI summary
An electrical connector assembly includes: an insulative housing; a terminal module assembly received in the insulative housing and including an upper part and a lower part stacked with each other in a vertical direction, each of the upper part and the lower part having a high-speed terminal module and a sideband terminal module, each of the high-speed terminal modules including plural ground terminals and differential pair terminals arranged alternately with the ground terminals in a transverse direction perpendicular to the vertical direction; a cable connected to the high-speed terminal module; and a ground bar located at a rear of the ground terminal and a metal shield member discrete from the ground terminal, the ground bar including a first bulged section, the metal shield member including a second bulged section, the first bulged section and the second bulged section cooperating with each other to surround the cable in a circumferential direction.