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Wave-absorbing meta material

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, small external environment interference, and thin thickness

Active Publication Date: 2013-01-23
KUANG CHI CUTTING EDGE TECH LTD
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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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Embodiment Construction

[0022] The basic physical principle of the absorbing material is that the material can effectively absorb the incident electromagnetic wave, convert the energy of the electromagnetic wave into heat energy or other forms of energy and dissipate it. The material should have two characteristics, namely, impedance matching characteristics and attenuation characteristics. The impedance matching characteristic refers to the reflection characteristic formed by the electromagnetic wave incident on the surface of the absorbing material from free space and reflected by the surface of the absorbing material. When an ideal absorbing material achieves perfect impedance matching characteristics, the electromagnetic wave incident from free space should form zero reflection on the surface of the ideal absorbing material, that is, all electromagnetic waves enter the interior of the ideal absorbing material. Since the free space impedance Z=1, according to the formula It can be seen that the i...

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Abstract

The invention relates to a wave-absorbing meta material. The wave-absorbing meta material comprises a base material with two opposite surfaces, wherein a plurality of artificial metal micro structures which are arranged in a periodic manner are arranged on at least one surface of the two opposite surfaces; when electromagnetic wave with incidence direction vertical to the two opposite surfaces passes through the meta material, the relative dielectric constant and the relative permeability of the meta material are almost equal. The wave-absorbing meta material uses a wave-absorbing principle which is different from that of the traditional wave-absorbing material to achieve an ideal wave-absorbing effect by periodically arranging the plurality of artificial metal micro structures on the base material and adjusting the metal micro structures; and moreover, the wave-absorbing meta material has the advantages of light weight, thin thickness, and easiness in regulation of electromagnetic parameters.

Description

technical field [0001] The invention relates to a wave-absorbing material, in particular to a wave-absorbing metamaterial. Background technique [0002] Absorbing materials refer to a class of functional composite materials that can absorb and attenuate incident electromagnetic wave energy, and convert electromagnetic energy into heat energy or other energy forms through the dielectric loss of the material. Absorbing materials have great application prospects in controlling electromagnetic pollution and manufacturing stealth materials. [0003] At present, the commonly used wave-absorbing materials include ferrite, barium titanate, metal micropowder, graphite, silicon carbide, conductive fiber, etc. Among them, the ferrite wave-absorbing material is the most researched and relatively mature wave-absorbing material. Ferrite has high magnetic permeability and resistivity at high frequencies, and electromagnetic waves are easy to enter and quickly attenuate. However, such abs...

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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 CUTTING EDGE TECH LTD
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