C-Shaped Conductive Sheet Layout for Lightweight High-Frequency Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheets made of reflective and absorptive materials face challenges in reducing weight while effectively shielding electromagnetic waves in high frequency bands, particularly for next-generation wireless communication systems.
Innovation Solution
A sheet comprising an insulating material and conductive materials with a substantially C-like shape, arranged such that their circumferential direction is parallel to the sheet's planar direction, forming conductive material layered portions without electrical contact, optimized for high frequency electromagnetic wave shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reflective materials using metal plates with large areas are used, then electromagnetic wave shielding performance is improved, but product weight increases
Solution Approach 1:
The patent divides the continuous metal plate into discrete conductive particles (spherical, flaky, or irregular shapes) with diameters of 1 μm to 100 μm. These particles are distributed throughout the resin matrix, creating a segmented conductive network that provides shielding performance while significantly reducing weight compared to solid metal plates.
Solution Approach 2:
The patent creates a composite material consisting of conductive particles dispersed in a resin matrix. This composite structure combines the electromagnetic wave shielding properties of conductive materials with the lightweight characteristics of resin, achieving a balance between shielding performance and weight reduction.
2Weight of moving object
If absorptive materials with small fillers are used, then product weight is reduced, but shielding performance in high frequency bands (100 GHz and above) deteriorates
Solution Approach 1:
The patent optimizes the particle size parameter of conductive fillers to a specific range (1 μm to 100 μm diameter) that enables effective shielding at 100 GHz and above. This parameter optimization ensures that the filler size is appropriate for the wavelength of high-frequency electromagnetic waves, maintaining shielding effectiveness while keeping the material lightweight.
Solution Approach 2:
The patent enhances the local conductive properties within the resin matrix by using conductive particles with optimized size and shape. The conductive particles create localized conductive networks that are particularly effective at interacting with high-frequency electromagnetic waves, providing frequency-specific shielding enhancement without increasing overall material density.
3Reliability
If conductive particles with optimized size and shape are used, then shielding performance in high frequency bands is improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses standard化的 conductive particle shapes (spherical, flaky, or irregular) that can be mass-produced using conventional powder metallurgy or particle fabrication techniques. These standardized particle forms are easily manufactured and processed, reducing the complexity of producing optimized shielding materials while maintaining high-frequency performance.
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 sheet achieves reduced weight and enhanced electromagnetic wave shielding performance in high frequency bands, effectively addressing the limitations of existing materials by utilizing a unique arrangement of conductive materials with a C-like shape.
Implementation Method 1
absorptive materials that absorb electromagnetic waves by using materials obtained by mixing conductive materials with organic materials such as resin or rubber
Implementation Method 2
a sheet including an insulating material, and a plurality of conductive materials each having a plate shape and having a substantially C-like shape
Implementation Method 3
reflective materials that reflect electromagnetic waves by using metal plates having a large area
Data Source
AI summary
A sheet includes an insulating material and a plurality of conductive materials each having a plate shape and having a substantially C-like shape as viewed from above in a thickness direction of the sheet. Each of the plurality of conductive materials is disposed such that a circumferential direction of the substantially C-like shape and a planar direction of the sheet are substantially parallel to each other. At least some of the plurality of conductive materials form a conductive material layered portion in which a plurality of the conductive materials are disposed in the thickness direction of the sheet without being in contact with each other.