Shielded Lead Module Layout for Low-Crosstalk High-Speed Connectors
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Solution Overview
Problem
High-speed electrical connectors face significant crosstalk issues between lead pairs due to the presence of ground wires, which affect transmission performance and increase costs, making it challenging to achieve reliable signal transmission at rates above 56 Gbit/s.
Innovation Solution
A lead module design that eliminates the need for ground wires between lead pairs by using shielding pieces on both sides as ground and shielding elements, with lead pairs sandwiched between them, reducing crosstalk while maintaining a simple structure and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ground wires are disposed between adjacent lead pairs, then shielding effect is improved, but crosstalk between lead pairs increases
Solution Approach 1:
The patent removes the ground wire from between adjacent lead pairs and extracts its shielding function to external shielding structures (shielding can and shielding plates). This separation eliminates the crosstalk-causing proximity effect while preserving the necessary electromagnetic shielding through properly positioned external ground structures.
Solution Approach 2:
The patent introduces an insulator as an intermediary substance between the lead pairs and the shielding structures. This insulator provides electrical isolation while allowing the shielding can and shielding plates to maintain their protective function without direct contact with the signal-carrying leads, thereby preventing crosstalk.
2Object-generated harmful factors
If all-round shielding housing is used to reduce crosstalk, then crosstalk performance is improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent divides the shielding function into separate components: a shielding can surrounding the lead pairs and additional shielding plates positioned at specific locations. This segmented approach provides effective crosstalk reduction while using fewer materials and simplifying manufacturing compared to a complete all-round shielding housing.
Solution Approach 2:
The patent applies shielding structures only where they are most needed for crosstalk reduction. The shielding can provides general protection, while localized shielding plates are positioned specifically between adjacent lead pairs at critical interfaces, optimizing the shielding effect while minimizing material usage and cost.
3Object-affected harmful factors
If ground wire is positioned close to lead pairs, then shielding effect is enhanced, but insertion loss increases
Solution Approach 1:
The insulator serves as a mediator that allows the shielding can and shielding plates to be positioned close to the lead pairs for effective shielding, while simultaneously providing electrical isolation that prevents direct capacitive coupling and reduces insertion loss. This intermediary layer enables optimal shielding distance without the energy loss associated with direct contact.
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 solution effectively reduces crosstalk between lead pairs and minimizes insertion loss, enabling reliable high-speed signal transmission at rates above 56 Gbit/s without the need for costly shielding housings, thus improving performance and reducing manufacturing costs.
Implementation Method 1
two shielding pieces, where the two shielding pieces each include a conductive material, the two shielding pieces are parallel to each other, the plurality of lead pairs are sandwiched between the two shielding pieces
Data Source
AI summary
This application provides a lead module. The lead module includes a plurality of lead pairs and two shielding pieces, and the two shielding pieces each are made of a conductive material and are located parallel to each other on two sides of the plurality of lead pairs. Therefore, a ground wire or a shielding element may no longer be disposed between the two shielding pieces in the lead module of this application and between parts that are of adjacent lead pairs and that correspond to a body part of a lead, and the lead module uses the two shielding pieces as the ground wire and the shielding element. Therefore, crosstalk between the lead pairs for signal transmission is effectively reduced with a simple structure. This application further provides an electrical connector including the lead module and a connector component including the electrical connector.