Ribbed Ground Plate for Crosstalk Reduction in Electrical Connectors
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Solution Overview
Problem
Conventional electrical connectors face challenges in increasing data transfer speeds without altering physical dimensions, as adding metallic crosstalk shields can lower impedance and create signal integrity issues at higher data transmission rates.
Innovation Solution
An electrical connector design featuring a dielectric housing with electrical signal contacts and a ground plate having stamped or embossed ribs, which provides a shield that reduces crosstalk without significantly affecting impedance or altering the connector's dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If metallic crosstalk shields are added to reduce crosstalk, then crosstalk is lowered, but impedance decreases and signal integrity deteriorates at high data transmission speeds
Solution Approach 1:
The ground plate is segmented into multiple raised ribs that are positioned between adjacent signal contact pairs. These ribs create localized shielding zones without forming a continuous metallic shield, thereby reducing crosstalk while preserving overall impedance characteristics. The segmentation allows selective shielding where needed without affecting the global impedance matching of the connector.
Solution Approach 2:
The raised ribs provide localized shielding properties only in the regions where crosstalk needs to be reduced (between signal pairs), while the rest of the ground plate maintains its original impedance characteristics. This local application of shielding quality avoids the global impedance degradation that would result from a complete metallic shield.
2Speed
If data transmission speed is increased to 10-40 Gigabits/sec, then data transfer capability is improved, but skew and impedance mismatches become problematic
Solution Approach 1:
The segmented rib structure provides localized impedance control between signal pairs without creating continuous impedance discontinuities. This allows high-speed signal transmission while maintaining consistent characteristic impedance across the connector interface.
3Length of stationary object
If the connector's physical dimensions are kept constant, then form factor compatibility is maintained, but it is difficult to add shielding without affecting other aspects
Solution Approach 1:
The raised ribs extend in the vertical dimension (height) from the ground plate surface, creating shielding functionality without increasing the lateral footprint of the connector. This dimensional approach allows crosstalk reduction while maintaining compatibility with existing connector form factors.
Data Source
AI summary
An electrical connector includes a dielectric housing, a plurality of electrical signal contacts carried by the dielectric housing, and a ground plate carried by the dielectric housing. The electrical signal contacts are arranged along a first plane, wherein the signal contacts define signal pairs. The signal contacts further define respective mating and mounting ends. The ground plate includes a ground plate body oriented in a second plane that is substantially parallel to the first plane and offset from the first plane. The ground plate body defines first and second opposed surfaces. The ground plate includes at least one rib that defines first and second opposed surfaces, wherein the first surface of the rib projects from the first surface of the ground plate body in a direction toward the first plane between adjacent signal pairs, and the second surface is recessed into the second surface of the ground plate body.