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Wave absorbing metamaterial

A technology of metamaterials and substrates, applied in the field of wave absorbing metamaterials, can solve the problems of high areal density, difficult matching of electromagnetic parameters, poor high temperature characteristics, etc., and achieve the effect of light weight, thin thickness and convenient adjustment

Active Publication Date: 2012-05-30
KUANG CHI INST OF ADVANCED TECH +1
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Problems solved by technology

However, such absorbing materials represented by ferrite have defects such as poor high temperature characteristics, high surface density, and difficult matching of electromagnetic parameters.

Method used

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  • Wave absorbing metamaterial
  • Wave absorbing metamaterial
  • Wave absorbing metamaterial

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Embodiment Construction

[0023] The basic physical principle of the absorbing material is that the material can effectively absorb the incident electromagnetic wave and convert the electromagnetic wave energy into heat or other forms of energy for dissipation. The material should have two characteristics, namely impedance matching characteristics and attenuation characteristics. The impedance matching characteristic refers to the reflection phenomenon of the incident electromagnetic wave on the surface of the absorbing material. When the ideal absorbing material is to achieve perfect impedance matching, the relative permittivity ε and relative permeability μ of the absorbing material should be equal, where Due to the loss of the absorbing material, the relative permittivity ε=ε'-jε" and the relative permeability μ=μ'-jμ". The attenuation characteristic refers to the phenomenon that the electromagnetic waves entering the material produce loss and be absorbed. The magnitude of the loss can be the electric...

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Abstract

The invention relates to a wave absorbing metamaterial which comprises a substrate and a plurality of artificial metal microstructures which are periodically arranged inside the substrate. When electromagnetic waves pass through the wave absorbing metamaterial, a relative dielectric constant and a relative magnetic conductivity of the metameterial are approximately equal. In the invention, a waveabsorbing principle different from a wave absorbing principle of a conventional wave absorbing material is adopted; an ideal wave absorbing effect is achieved by periodically arranging various artificial metal microstructures in the substrate and regulating the sizes of the artificial metal microstructures; and the wave absorbing metamaterial has the advantages that the weight is light, the thickness is low and an electromagnetic parameter is easy to regulate. Furthermore, the artificial metal microstructures of the wave absorbing metamaterial are three-dimensional structures and the artificial metal microstructures which are the three-dimensional structures can effectively absorb the electromagnetic waves in random incident directions in a three-dimensional space, so that the practicality of the wave absorbing metamaterial is improved.

Description

Technical field [0001] The invention relates to a wave absorbing material, in particular to a wave absorbing metamaterial. Background technique [0002] Absorbing material refers to a type of functional composite material that can absorb and attenuate incident electromagnetic wave energy and convert the electromagnetic energy into heat or other forms of energy through the material's dielectric loss. Absorbing materials have great application prospects in the treatment of electromagnetic pollution and the manufacture of stealth materials. [0003] At present, the commonly used absorbing materials include ferrite, barium titanate, metal powder, graphite, silicon carbide, conductive fiber, etc. Among them, ferrite absorbing materials have been studied and more mature. Ferrite has high permeability and resistivity at high frequencies, and electromagnetic waves are easy to enter and can decay quickly. However, such absorbing materials represented by ferrite have disadvantages such as ...

Claims

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Application Information

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IPC IPC(8): H05K9/00
Inventor 刘若鹏栾琳赵治亚王文剑
Owner KUANG CHI INST OF ADVANCED TECH
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