FSS Pattern Layer for Selective Electromagnetic Wave Suppression
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Solution Overview
Problem
The increasing use of wireless communication devices has raised concerns about the impact of electromagnetic waves on human health, with potential links to diseases such as leukemia and brain tumors, and there is a need for a solution to selectively suppress these waves.
Innovation Solution
A cover accessory for wireless communication devices featuring a frequency selective surface (FSS) pattern layer with electromagnetic surface resistance, which can be etched or printed on a dielectric layer, to selectively cut off or pass specific frequency bands of electromagnetic waves, thereby reducing exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cover accessory is added to suppress electromagnetic waves, then health protection is improved, but device complexity increases
Solution Approach 1:
The FSS pattern layer is integrated within the cover accessory structure, nesting the electromagnetic suppression function inside the existing cover component. The pattern layer is formed by etching or printing on the cover surface, creating a nested configuration where the functional layer is embedded within the structural element.
Solution Approach 2:
The cover accessory combines the base cover material with the FSS pattern layer to create a composite structure. The FSS pattern layer, made of conductive materials like indium tin oxide or carbon nanotubes on a dielectric substrate, is integrated with the cover material to provide both mechanical protection and electromagnetic wave suppression functionality.
2Ease of manufacture
If FSS pattern material is printed or etched on dielectric layer, then manufacturing flexibility is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent replaces traditional mechanical etching methods with printing techniques for forming the FSS pattern layer. The conductive paste or ink is printed directly onto the dielectric layer using printing processes, substituting complex mechanical etching equipment with more flexible and cost-effective printing systems while maintaining pattern accuracy.
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 FSS pattern layer effectively suppresses electromagnetic waves, reducing exposure to harmful frequencies while allowing other frequencies to pass through, thus mitigating health risks and maintaining device performance.
Implementation Method 1
an electromagnetic suppressing pattern layer on one surface of each of the first and second covers, wherein the electromagnetic suppressing pattern layer includes a first dielectric layer and a frequency selective surface (FSS) pattern with a unit cell having electromagnetic surface resistance periodically repeated thereon
Data Source
AI summary
Provided is a cover accessory for a wireless communication device, includingan electromagnetic suppressing pattern layer on a surface adjoining at least one surface on which an electromagnetic wave is irradiated from the wireless communication device, wherein the electromagnetic suppressing pattern layer includes a first dielectric layer and a frequency selective surface (FSS) pattern with a unit cell having electromagnetic surface resistance periodically repeated thereon, and the FSS pattern is provided by etching the first dielectric layer to inject an FSS pattern material or by printing the FSS pattern material on the first dielectric layer.