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Wave-absorbing material and preparation method therefor

A technology of wave-absorbing materials and conductive composite materials, applied in the direction of electrical components, magnetic field/electric field shielding, etc., to achieve the effect of enhancing mechanical properties and improving wave-absorbing performance

Inactive Publication Date: 2018-02-09
AIR FORCE UNIV PLA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can only achieve narrow-band absorption. Even though the absorption bandwidth can be broadened through multi-layer structure compounding, the thickness becomes the main factor limiting its application.

Method used

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  • Wave-absorbing material and preparation method therefor
  • Wave-absorbing material and preparation method therefor
  • Wave-absorbing material and preparation method therefor

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Embodiment Construction

[0026] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] Such as figure 1 Shown is a schematic diagram of the periodic structure of the microwave absorbing material of the embodiment of the present invention, and the enlarged part is a schematic diagram of the geometric unit of the microwave absorbing material. figure 2 A schematic diagram of the geometric unit in the x-z and x-y directions is given. Such as figure 1 with figure 2 As shown, the absorbing material provided by the embodiment of the present invention includes a copper metal back plate and a conductive composite material arranged on the copper metal back plate. The conductive composite material has a regular hexagonal honeycom...

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Abstract

The invention discloses a wave-absorbing material. The wave-absorbing material comprises a copper metal back plate and a conductive composite material arranged on the copper metal back plate; the conductive composite material is compounded by a regular hexagonal honeycomb structure and a resistor sheet and is arranged on the copper metal back plate in an ordered manner. The preparation method comprises the steps of 1) preparing the resistor sheet and a PLA material regular hexagonal honeycomb structure; 2) performing compounding of the resistor sheet and the regular hexagonal honeycomb structure; and 3) enabling the composite material to be compounded with the copper metal back plate. By virtue of the composite type ultra-wide-band wave-absorbing material processed in the invention, the wave-absorbing performance of oblique incidence TM wave can be improved, and meanwhile, the mechanical performance of the wave-absorbing material can be reinforced.

Description

technical field [0001] The invention relates to the field of composite material wave-absorbing stealth technology, and more specifically relates to a wave-absorbing material and a preparation method thereof. Background technique [0002] Wave-absorbing stealth materials are widely used in modern weapons and equipment. They can efficiently absorb radar waves and reduce the probability of being detected, thereby improving survival and combat capabilities. Most traditional wave-absorbing metamaterials use periodic metal structural units to absorb electromagnetic waves through electromagnetic resonance. This method can only achieve narrow-band absorption. Even though the absorption bandwidth can be broadened by compounding the multi-layer structure, the thickness becomes the main factor limiting its application. Contents of the invention [0003] The purpose of the present invention is to solve the above problems, and provide a microwave absorbing material and a preparation m...

Claims

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Application Information

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IPC IPC(8): H05K9/00
Inventor 马华蒋伟屈绍波王军闫雷雷王甲富
Owner AIR FORCE UNIV PLA
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