Discontinuous Shielding Elements for Communication Cables

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Solution Overview

Problem

Conventional communication cables face signal degradation due to noise, interference, and crosstalk, particularly with continuous shields that can cause electrical perturbations and safety hazards, and existing segmented shields have gaps that reduce performance.

Innovation Solution

The use of electrically conductive patches arranged in a discontinuous manner with circumferential shorting and overlapping segments to form a shield element that reduces electrical perturbations and eliminates gaps, enhancing signal integrity and safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a continuous shield is used to protect against electromagnetic interference, then shielding effectiveness is improved, but electrical perturbations and safety hazards increase

Engineering Contradiction:

Improveelectromagnetic interferenceVSAvoidelectrical perturbations

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The continuous shield is divided into multiple discrete circumferential segments that are electrically isolated from each other. Each segment provides local electromagnetic shielding while the gaps between segments prevent continuous electrical pathways, thereby eliminating electrical perturbations and safety hazards while maintaining shielding effectiveness against electromagnetic interference.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If a continuous shield is used to provide electromagnetic protection, then shielding performance is improved, but grounding requirements and installation complexity increase

Engineering Contradiction:

Improvealien crosstalkVSAvoidgrounding requirements

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The shield is segmented into electrically isolated circumferential sections that block alien crosstalk between adjacent cables without requiring continuous grounding. The segmented structure inherently breaks electrical continuity, eliminating the need for complex grounding schemes while maintaining protection against electromagnetic interference and alien crosstalk.

Inventive Principle:

Principle #1Segmentation

3Object-generated harmful factors

If gaps are introduced in the shield to eliminate electrical continuity, then safety hazards are reduced, but shielding effectiveness decreases

Engineering Contradiction:

Improveshock hazardsVSAvoidsignal interference

Core Design Contradiction:

Object-generated harmful factorsVSObject-affected harmful factors

Solution Approach 1:

The shield comprises multiple circumferential segments with gaps between them, which electrically isolates the segments to eliminate shock hazards. Despite the gaps, each segment provides local electromagnetic shielding, and the collective arrangement maintains overall shielding effectiveness against signal interference while ensuring safety.

Inventive Principle:

Principle #1Segmentation

4Object-generated harmful factors

If segmented shields with gaps are used to improve safety, then electrical isolation is improved, but return loss performance deteriorates

Engineering Contradiction:

Improveelectrical perturbationsVSAvoidreturn loss

Core Design Contradiction:

Object-generated harmful factorsVSReliability

Solution Approach 1:

The shield is divided into circumferential segments that provide electrical isolation to reduce electrical perturbations. The segments are positioned and dimensioned to maintain adequate shielding coverage, balancing electrical isolation benefits with acceptable return loss performance for reliable signal transmission.

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

This solution improves electrical performance by reducing return loss and cross-talk loss, while eliminating the need for continuous grounding and minimizing electromagnetic interference.

Implementation Method 1

One approach to addressing signal degradation associated with communication cables is to circumferentially encase cables or various cable components in a continuous shield

Methodology Applied

Scientific EffectElectromagnetic shielding: Faraday Cage

Implementation Method 2

electrically conductive patches arranged in a discontinuous manner with circumferential shorting

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS9275776B1Shielding elements for use in communication cables

Publication Date: 2016.03.01 SUPERIOR ESSEX INT INC

AI summary

Cables incorporating discontinuous shielding elements are described. A cable may include at least one twisted pair of individually insulated conductors, and a shield element may be positioned adjacent to the at least one twisted pair. The shield element may include a plurality of segments positioned along a longitudinal direction of the cable. Each segment may include a respective dielectric substrate with electrically conductive material formed on the substrate, and each segment may be electrically isolated from the other segments. A respective overlap may be formed between adjacent segments along a shared longitudinal edge. Additionally, a jacket may be formed around the at least one twisted pair and the shield element.