High-Speed Connector Shielding Layout for 112 Gbps Signal Integrity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing electrical connectors face challenges in handling high data rates and reducing electrical interference, particularly at very high frequencies, due to the close proximity of conductors and the need for effective shielding and impedance control.

Innovation Solution

Incorporation of conductive shielding and lossy material at strategic locations within the connectors, along with compressible mounting interface shielding and flexible structures to reduce cross-talk and resonance, while ensuring stable connection to ground planes and cable shields.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conductors are placed in close proximity to increase density, then the number of circuits per area increases, but electrical interference and crosstalk between adjacent signal conductors increases

Engineering Contradiction:

Improvedata transmission rateVSAvoidelectrical interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

Ground conductors are introduced as intermediary elements between adjacent signal conductors. These ground conductors act as mediators that provide electrical shielding and reference potential, reducing crosstalk and electromagnetic interference between signal paths while enabling higher conductor density.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The connector implements alternating patterns of signal and ground conductors, creating local zones of different electrical characteristics. Each signal conductor is locally surrounded by ground conductors that provide targeted shielding, allowing high density while maintaining signal integrity through localized quality differentiation.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If shield members are placed between signal conductors to reduce interference, then crosstalk is reduced, but the impedance of conductors is affected and device complexity increases

Engineering Contradiction:

ImprovecrosstalkVSAvoidconnector structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The ground conductors serve dual functions: they act as shields between signal conductors to reduce crosstalk, and simultaneously serve as current-carrying signal paths for differential pairs. This merging of shielding and signaling functions reduces overall connector complexity while maintaining electromagnetic compatibility.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Each conductor in the connector is designed to potentially serve multiple roles depending on its position and configuration. Ground conductors can function as shields, signal carriers, or reference planes, allowing the same structural elements to provide multiple benefits without requiring separate dedicated components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If the number of circuits in a given area is increased to handle more data, then data capacity increases, but electrical interference and signal quality deteriorate

Engineering Contradiction:

Improvedata capacityVSAvoidsignal integrity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The connector is segmented into multiple independent columns, each containing a complete set of differential pairs and ground conductors. This segmentation isolates signal paths into discrete units with controlled electromagnetic fields, allowing high overall capacity while maintaining signal integrity within each segment through controlled impedance and shielding.

Inventive Principle:

Principle #1Segmentation

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 enables connectors to operate effectively at frequencies above 112 Gbps, reducing cross-talk and resonance, and maintaining signal integrity by providing consistent shielding and stable connections, thus supporting high data rates.

Implementation Method 1

the body and mating portion comprising insulative material, the mating portion further comprising lossy material

Methodology Applied

Scientific EffectElectromagnetic absorption: Absorption (EM radiation)

Implementation Method 2

compressible mounting interface shielding

Methodology Applied

Scientific EffectCompression: Compression

Implementation Method 3

flexible structures to reduce cross-talk and resonance

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS20250350070A1High speed connector

Publication Date: 2025.11.13 FCI USA LLC

AI summary

Electrical connectors for very high speed signals, including signals at or above 112 Gbps. Effectiveness of shielding along the signal paths through the mating electrical connectors may be enhanced through the use of one or more techniques, including enabling two-sided shielding, connections between shield members and between shield members and grounded structures of printed circuit boards to which the connectors are mounted, and selective positioning of lossy material. Such techniques may be simply and reliably implemented in high density connector using one or more techniques. An electrical connector may include core members held by a housing together with leadframe assemblies attached to the core members. The core members may include features that would be difficult to mold in a housing and may include both shields and lossy materials in locations that would be difficult to incorporate in a leadframe assembly.