Conductive Ink Textile for Wideband Electromagnetic Wave Absorption

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Solution Overview

Problem

Existing materials for absorbing electromagnetic radiation are often heavy, brittle, limited to narrow frequency ranges, and complex to apply, particularly for curved surfaces or variable shielding needs.

Innovation Solution

A thin, flexible material with a printed textile layer using conductive ink in specific patterns is developed, allowing for easy adaptation and wide frequency absorption, comprising multiple layers with a non-woven microfiber structure and a dielectric supporting layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional electromagnetic wave absorbing materials are used, then absorption effectiveness is improved, but weight increases and flexibility decreases

Engineering Contradiction:

Improveabsorption effectivenessVSAvoidmaterial weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent employs a composite material structure consisting of a flexible support substrate combined with a conductive ink pattern layer. This composite approach allows the material to achieve effective electromagnetic wave absorption through the conductive pattern while the flexible substrate provides mechanical support with minimal weight, resolving the contradiction between absorption effectiveness and weight.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent uses a thin, flexible support substrate as the base for the absorbing material. This thin-film approach enables the material to be lightweight and adaptable to various surfaces while maintaining its electromagnetic absorption functionality through the integrated conductive pattern, directly addressing the weight and flexibility issues of traditional materials.

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If traditional electromagnetic wave absorbing materials are used, then absorption effectiveness is improved, but adaptability to different surfaces decreases

Engineering Contradiction:

Improveabsorption effectivenessVSAvoidsurface adaptability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The flexible support substrate enables the absorbing material to conform to curved and irregular surfaces, providing high adaptability while maintaining absorption effectiveness. The thin-film structure can be wrapped around or applied to various geometries, solving the contradiction between effectiveness and adaptability.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The material design allows for dynamic adaptation to different surface geometries through its flexibility. The conductive pattern can be customized for different applications and frequencies, enabling the same base material to adapt to various surfaces and requirements, resolving the adaptability contradiction.

Inventive Principle:

Principle #15Dynamics

3Reliability

If traditional electromagnetic wave absorbing materials are used, then absorption effectiveness is improved, but ease of application decreases

Engineering Contradiction:

Improveabsorption effectivenessVSAvoidease of application

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The flexible, thin-film construction makes the material easy to handle, install, and apply to different surfaces. Unlike rigid traditional materials, this flexible format can be simply wrapped, adhered, or mounted, greatly improving ease of application while preserving absorption effectiveness through the conductive pattern design.

Inventive Principle:

Principle #30Flexible shells and thin films

4Reliability

If traditional electromagnetic wave absorbing materials are used, then absorption effectiveness is improved, but frequency range limitation increases

Engineering Contradiction:

Improveabsorption effectivenessVSAvoidfrequency range

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The conductive ink pattern can be designed with different geometries, sizes, and configurations to target specific frequency ranges. By adjusting the pattern parameters, the same flexible substrate structure can be adapted for different frequencies, enabling broad frequency range coverage while maintaining absorption effectiveness across multiple bands.

Inventive Principle:

Principle #15Dynamics

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 material effectively absorbs electromagnetic waves over a wide range of frequencies, reducing electromagnetic interference and parasitic radiation, while being lightweight and easy to implement on various surfaces.

Implementation Method 1

a material absorbing electromagnetic waves, characterized in that it comprises at least one printed textile layer by means of at least one conductive ink in accordance with at least one pattern

Methodology Applied

Scientific EffectElectromagnetic absorption: Absorption (EM radiation)

Implementation Method 2

the material transforms the radar waves into infrared waves, so that there is no reflected wave

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS8803107B2Material absorbing electromagnetic waves

Publication Date: 2014.08.12 DELPECH MARC

AI summary

The invention relates to a material that absorbs electromagnetic waves, characterized in that it includes at least one textile layer printed using at least one conductive ink in accordance with at least one pattern including printed areas and non-printed areas in an arrangement suitable for a corresponding range of absorption frequencies.