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Broadband wave-absorbing material

A wave absorbing material and broadband technology, applied in the field of wave absorbing materials, can solve the problems of complex design, limited mechanical properties of materials, unsatisfactory mechanical properties, etc.

Active Publication Date: 2012-12-05
KUANG CHI INST OF ADVANCED TECH
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Problems solved by technology

[0004] The existing wave-absorbing materials make use of the absorption properties of each material for electromagnetic waves. By designing the components of different materials, the mixed materials have wave-absorbing properties. The design of such materials is complicated and does not have large-scale promotion. The mechanical properties of the material are limited by the mechanical properties of the material itself, which cannot meet the needs of special occasions

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] Light, as a kind of electromagnetic wave, when it passes through glass, because the wavelength of light is much larger than the size of atoms, we can use the overall parameters of the glass, such as the refractive index, rather than the detailed parameters of the atoms that make up the glass to describe The response of glass to light. Correspondingly, when studying the response of materials to other electromagnetic waves, the response of any structure in the material whose scale is much smaller than the wavelength of the electromagnetic wave to electromagnetic waves can also be described by the overall parameters of the material, such as the dielectric constant ε and magnetic permeability μ. By designing the structure of each point of the material, the dielectric constant and magnetic permeability of each point of the material are the same or d...

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Abstract

The invention discloses a broadband wave-absorbing material which is virtually divided into a plurality of basic units, wherein each basic unit comprises a plurality of sheet layers which are stacked along the transmission direction of an electromagnetic wave; each sheet layer comprises a substrate and a metal coated layer coated on the surface of the substrate; and each sheet layer is increased in size along the transmission direction of the electromagnetic wave gradually, and the central axis of the sheet layers are overlapped. By designing pyramidal basic units and preferably making the substrates at different parts of the pyramidal basic units have different dielectric constants, the effects on impedance matching and broadband wave-absorption are realized; and the broadband wave-absorbing material is within a frequency bandwidth from 7.5 GHZ (gigahertz) to 12 GHZ, and the decay degree of the electromagnetic wave can all be more than 10dB.

Description

technical field [0001] The invention relates to a wave-absorbing material, in particular to a broadband wave-absorbing material. Background technique [0002] With the rapid development of science and technology, there are more and more various technologies and products that use electromagnetic waves as the medium, and the impact of electromagnetic radiation on the environment is also increasing. For example, radio waves may cause interference to the airport environment, causing aircraft flights to fail to take off normally; mobile phones may interfere with the work of various precision electronic medical devices; even ordinary computers will radiate electromagnetic waves carrying information, which may It is received and reproduced kilometers away, resulting in the leakage of national defense, political, economic, technological and other intelligence. Therefore, controlling electromagnetic pollution and finding a material that can resist and weaken electromagnetic radiatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
Inventor 刘若鹏赵治亚寇超锋叶金财
Owner KUANG CHI INST OF ADVANCED TECH
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