Multilayer Casing Device for Electromagnetic Wave Attenuation
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Solution Overview
Problem
Existing solutions for reducing electromagnetic radiation from cellular devices either block the radiation completely, disconnecting the device from the network, or only partially attenuate the radiation, and are either costly or complex to manufacture.
Innovation Solution
A multilayer casing device composed of alternating layers of metallic and textile materials, including copper, wool or cotton, and steel wool, which channels electromagnetic radiation towards a central copper core, transforming it and allowing sufficient radiation to pass through for network connectivity while attenuating the signal by over 90% Specific Absorption Rate (SAR) and 70% emitted power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a complete radiation blocking material is used, then electromagnetic radiation protection is improved, but network connectivity is lost
Solution Approach 1:
The radiation shielding function is divided into multiple layers with different materials (metallic layer, dielectric layer, conductive fabric layer), each contributing differently to radiation attenuation while allowing partial signal transmission. This segmented approach enables selective attenuation of harmful radiation while preserving sufficient signal for network connectivity.
Solution Approach 2:
The patent optimizes the thickness and material properties of each layer to achieve specific attenuation parameters. By carefully controlling the parameters of each layer (metallic layer thickness, dielectric constant, conductive fabric density), the system achieves over 90% SAR reduction while maintaining enough signal penetration for network operation.
2Object-affected harmful factors
If conventional radiation shielding materials are used, then electromagnetic radiation is blocked, but manufacturing complexity and cost increase
Solution Approach 1:
The patent uses a composite structure combining three different material types (metallic shielding layer, dielectric layer, and conductive fabric layer) to achieve superior radiation attenuation. This composite approach provides effective shielding while using relatively simple, manufacturable materials and processes for each individual layer.
Solution Approach 2:
The conductive fabric layer incorporates porous or mesh-like structures that allow electromagnetic signals to pass through while still providing radiation attenuation. This porous structure reduces material usage and manufacturing complexity compared to solid shielding materials, while maintaining effectiveness.
3Reliability
If partial radiation attenuation is applied, then network connectivity is maintained, but radiation protection effectiveness is reduced
Solution Approach 1:
The shielding function is segmented across multiple layers, with the metallic layer providing strong attenuation, the dielectric layer enhancing the effect through reflection and absorption, and the conductive fabric layer providing additional attenuation while maintaining signal permeability. This segmentation achieves over 90% SAR reduction while preserving network connectivity.
Solution Approach 2:
The combination of different material properties in the composite structure creates synergistic effects. The metallic layer reflects and absorbs radiation, the dielectric layer provides additional reflection and phase shifting, and the conductive fabric layer adds further attenuation while maintaining porosity for signal passage. Together they achieve high protection effectiveness while maintaining connectivity.
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 device effectively reduces electromagnetic radiation emitted by cellular devices, maintaining network connectivity while minimizing exposure, and is designed for large-scale, cost-effective manufacturing.
Implementation Method 1
a first layer (2) made of diamagnetic metallic material, made at least in part of copper
Implementation Method 2
a third layer (4) made of ferromagnetic material
Implementation Method 3
channels electromagnetic radiation towards a central copper core, transforming it
Data Source
AI summary
A multilayer casing device for attenuating electromagnetic waves is made of at least one textile material, at least one metal material. The device is made up of a stack provided with at least, consecutively from the inside to the outside: a first diamagnetic metal material layer at least partially made of copper, a second textile layer at least partially made of wool or cotton, a third layer made of a ferromagnetic material, and a fourth textile layer at least partially made of wool and cotton. The device is also made up of a complementary stack of identical layers (the second textile layer, the third ferromagnetic layer and the fourth textile layer) extending symmetrically in relation to the first copper layer.