Artificial Electromagnetic Material Broadband Wave Absorption
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Solution Overview
Problem
Existing wave-absorbing materials have a constant absorbing frequency band, limiting their versatility in addressing electromagnetic radiation across various frequencies.
Innovation Solution
An artificial electromagnetic material featuring a substrate with artificial microstructures, including a series of concentrically arranged split rings on the front surface and a fishnet-structured metal foil on the back surface, designed to absorb electromagnetic waves across a broad frequency band by repeatedly reflecting and re-entering waves into the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional wave-absorbing materials are used, then the absorbing frequency band is fixed, but the versatility across various frequencies is limited
Solution Approach 1:
The wave-absorbing material is divided into multiple layers with distinct functions: a first substrate layer, a second substrate layer, and an artificial microstructure layer. Each layer is optimized for specific frequency ranges, enabling broadband absorption while maintaining manageable complexity through modular design
Solution Approach 2:
The patent combines multiple materials with different electromagnetic properties: dielectric substrates, conductive artificial microstructures (split rings and wires), and lossy tangent materials. This composite structure enables the material to absorb electromagnetic waves across a broad frequency spectrum by leveraging the complementary characteristics of each material component
2Loss of energy
If single-frequency wave-absorbing materials are used, then the absorption efficiency at a specific frequency is high, but the absorption bandwidth is narrow
Solution Approach 1:
The artificial microstructures include variable geometric parameters (split ring dimensions, wire configurations, spacing) that can be adjusted to tune the resonant frequencies. This dynamic design allows the material to maintain high absorption efficiency across multiple frequency bands by optimizing the geometric parameters for broadband performance
Solution Approach 2:
The patent employs multiple geometric parameters (ring radius, wire diameter, spacing between elements, substrate thickness) that can be independently optimized. By changing these parameters, the material achieves broadband absorption from 8 GHz to 18 GHz, transforming a single-frequency absorber into a multi-frequency solution
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 achieves high-efficiency broadband wave-absorbing capabilities, effectively reducing electromagnetic interference across a wide frequency range, such as from 15.05GHz to 15.42GHz, by enhancing the capacitive effect and reflection of electromagnetic waves.
Implementation Method 1
The material achieves high-efficiency broadband wave-absorbing capabilities, effectively reducing electromagnetic interference across a wide frequency range, such as from 15.05GHz to 15.42GHz, by enhancing the capacitive effect and reflection of electromagnetic waves
Implementation Method 2
designed to absorb electromagnetic waves across a broad frequency band by repeatedly reflecting and re-entering waves into the substrate
Implementation Method 3
The metal foil is a fishnet structure having meshes that are located on a common junction of four adjacent substrate units
Data Source
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AI summary
The present invention provides an artificial microstructure. The artificial microstructure includes at least three split rings. The at least three split rings surround and embed in turn. Each split ring is formed by a wire which is made of conductive material, with two terminals of the wire towards each other to form an opening of the corresponding split ring. The present invention also provides an artificial electromagnetic material using the artificial microstructure. The artificial electromagnetic material with the artificial microstructure can achieve the function of broadband wave-absorbing.