Knitted Conductive Mesh Shielding for Electromagnetic Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic components are affected by external and self-generated electromagnetic interference, leading to performance disruptions, and existing shielding methods like replacing components or using conductive materials like aluminum foil are often unsatisfactory.
Innovation Solution
A conductive mesh structure with a large surface area is used to induce eddy currents that generate counteracting electromagnetic fields, effectively blocking external interference while allowing components to operate and connect with external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conductive materials like aluminum foil are used to shield electronic components, then electromagnetic interference is blocked, but the shielding effectiveness is insufficient and components remain affected by interference
Solution Approach 1:
The patent employs a composite shielding structure combining conductive mesh material with magnetic shielding material. The conductive mesh (e.g., copper or aluminum wire mesh) provides electrostatic shielding by conducting interference signals to ground, while the magnetic shielding material (e.g., mu-metal or ferrite) provides magnetic shielding by redirecting magnetic field lines. This composite approach overcomes the limitation of single-material shielding and achieves comprehensive electromagnetic interference protection.
Solution Approach 2:
The patent optimizes key parameters of the shielding structure including mesh density (number of wires per unit area), wire diameter, mesh aperture size, and layer spacing. By adjusting these parameters, the shielding effectiveness is enhanced while maintaining flexibility and adaptability to different electronic component configurations. The conductive mesh is designed with specific geometric parameters to maximize interference cancellation capability.
2Reliability
If electronic components are replaced to avoid interference, then performance stability improves, but device complexity and cost increase
Solution Approach 1:
The patent introduces an intermediary shielding structure (conductive mesh combined with magnetic shielding material) placed between the electronic components and the external environment. This intermediary layer intercepts and redirects electromagnetic interference before it reaches the sensitive components, allowing the original components to continue operating without replacement while maintaining performance stability.
3Object-affected harmful factors
If anti-interference devices are added at signal or power lines, then interference protection is provided, but the shielding effectiveness remains unsatisfactory
Solution Approach 1:
The patent divides the shielding function into multiple segments: conductive mesh for electrostatic shielding, magnetic shielding material for magnetic field shielding, and grounding structures for signal dissipation. Each segment addresses a specific aspect of electromagnetic interference, and their combined effect provides comprehensive protection that exceeds the capability of single-point anti-interference devices on signal or power lines.
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 mesh structure provides robust electromagnetic shielding, enhancing the effectiveness of interference cancellation and enabling continuous operation of electronic components.
Implementation Method 1
A conductive mesh structure with a large surface area is used to induce eddy currents that generate counteracting electromagnetic fields
Implementation Method 2
A conductive mesh structure with a large surface area is used to induce eddy currents that generate counteracting electromagnetic fields
Data Source
AI summary
An electromagnetic shielding apparatus is provided. In one embodiment, the shielding apparatus, comprises a plurality of first ply yarns and a plurality of second ply yarns. Each of the first ply yarns comprises a plurality of metal filaments, and each of the second ply yarns comprises a plurality of metal filaments. The first ply yarns and the second ply yarns are interwoven with each other to form a first knitted layer, and the first knitted layer is configured to deform to accommodate an object received therein.