High-Speed Connector Layout for Crosstalk and Signal Integrity
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Solution Overview
Problem
Existing high-speed connectors suffer from insufficient structural strength and poor electromagnetic characteristics, leading to increased crosstalk interference and signal quality degradation, particularly at higher frequencies.
Innovation Solution
The high-speed connector design includes an insulating housing with multiple terminal assemblies, each comprising a base body, terminals, and a metal plate. The terminal assemblies are arranged to form a QSFP or QSFP-DD configuration, with sheet structures made of plastic material used to adjust the dielectric coefficient of the peripheral structure, thereby improving electromagnetic characteristics and reducing crosstalk interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a metallic plating layer is fully covered on the shielding structure to achieve shielding function, then the electromagnetic shielding capability is improved, but the high-frequency characteristic becomes poorer due to signal reflection and resonance
Solution Approach 1:
The patent applies local quality by selectively plating only specific areas of the shielding structure with metallic material. The peripheral structure includes unplated dielectric regions that allow high-frequency signals to pass without reflection, while plated regions provide shielding against crosstalk interference. This localized approach resolves the contradiction by having different regions serve different functions: plated areas for shielding and unplated areas for high-frequency signal transmission.
2Device complexity
If the grounding plate uses integrally stamped elastic arms to simplify structure, then the manufacturing complexity is reduced, but the structural strength and shielding capability are insufficient
Solution Approach 1:
The patent employs composite materials by combining dielectric material for the main body of the grounding plate with metallic plating on specific areas. This composite structure provides both the structural integrity needed for strength and the electrical conductivity required for effective shielding. The dielectric base offers mechanical strength while the metallic plating enhances electrical performance, resolving the contradiction between structural strength and shielding capability.
3Object-affected harmful factors
If the peripheral structure is fully metallic to improve shielding, then the crosstalk protection is enhanced, but the dielectric coefficient adjustment capability is lost and high-frequency transmission deteriorates
Solution Approach 1:
The patent applies parameter changes by adjusting the dielectric coefficient of the peripheral structure through selective metallic plating on a dielectric base. By controlling the extent and distribution of metallic plating, the effective dielectric coefficient can be optimized to balance crosstalk protection and signal transmission performance. This allows the structure to provide shielding while maintaining appropriate electromagnetic properties for high-frequency signal transmission.
Data Source
AI summary
A high-speed connector includes an insulating housing, a first terminal assembly received in the insulating housing, a second terminal assembly received in the insulating housing, a third terminal assembly received in the insulating housing, and a fourth terminal assembly received in the insulating housing. The second terminal assembly is opposite to the first terminal assembly along an up-down direction. The third terminal assembly is disposed between the first terminal assembly and the second terminal assembly. The fourth terminal assembly is corresponding to the third terminal assembly. The fourth terminal assembly is disposed between the second terminal assembly and the third terminal assembly.