Grounding Bar Electrical Connector Reducing Crosstalk

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Solution Overview

Problem

High-speed electrical connectors, such as those for Serial Attached SCSI (SAS) interfaces, face challenges with signal crosstalk and attenuation, particularly at speeds above 6.0 Gbps, which affects performance and compatibility with higher speed standards like 12 Gbps.

Innovation Solution

The design of an electrical connector with an insulating housing and a unique arrangement of contacts and grounding bars, where each group of contacts is loaded on opposite surfaces of an uninterrupted tongue portion, with elastic fingers connecting grounding contacts to reduce crosstalk and enhance signal integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If signal transmission speed is increased to above 6.0 Gbps, then data transmission capability is improved, but crosstalk and signal attenuation increase

Engineering Contradiction:

Improvesignal transmission speedVSAvoidcrosstalk

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent introduces grounding bars as intermediary elements between signal contacts. These grounding bars act as mediators that provide dedicated return paths for high-speed signals, isolating them from other signal paths and thereby reducing crosstalk effects at transmission speeds above 6.0 Gbps

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The connector is segmented into distinct signal contact groups, each group served by its own dedicated grounding bar. This segmentation isolates high-speed signal paths from each other, preventing interference and crosstalk between adjacent signals while maintaining high transmission speeds

Inventive Principle:

Principle #1Segmentation

2Speed

If signal transmission speed is increased to above 6.0 Gbps, then data transmission capability is improved, but signal attenuation increases

Engineering Contradiction:

Improvesignal transmission speedVSAvoidsignal attenuation

Core Design Contradiction:

SpeedVSLoss of energy

Solution Approach 1:

The grounding bars serve as intermediary reference planes that provide stable electrical potential references for high-speed signals. This reduces signal integrity degradation and attenuation by providing controlled impedance paths and minimizing reflections at high transmission speeds

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If grounding bars are added to reduce crosstalk, then signal integrity is improved, but device complexity increases

Engineering Contradiction:

Improvesignal integrityVSAvoidconnector structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The grounding bars are merged with the insulating housing structure, integrating the grounding function into the existing connector framework. This reduces overall device complexity by combining multiple functions (structural support, insulation, and grounding) into unified components rather than adding separate independent elements

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS8702451B2Electrical connector with grounding bars therein to reduce cross talking

Publication Date: 2014.04.22 HON HAI PRECISION INDUSTRY CO LTD

AI summary

sa An electrical connector includes an insulating housing defining an uninterrupted tongue portion with opposite first surface and second surface and a plurality of contacts loaded in the tongue portion. The contacts includes a first group of contacts with first contacting portions loaded in the first surface, a second group of contacts with second contacting portions loaded in the second surface. Each of the first and second group of contacts is composed of signal contacts and grounding contacts and a connecting bar is assembled to electrically connect at least one first grounding contact and one second grounding contact.