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A Magnetic Broadband Electromagnetic Absorbing Metamaterial

A technology of electromagnetic wave absorption and metamaterials, which is applied in the direction of synthetic resin layered products, chemical instruments and methods, layered products, etc., can solve problems such as complex production technology, and achieve broadened wave-absorbing frequency band, good military significance and social benefits , The effect of excellent broadband absorbing performance

Active Publication Date: 2022-07-01
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the above patents use soft magnetic materials as the periodic units of metamaterials to achieve a wider frequency band absorbing effect, and the production technology is relatively complicated.

Method used

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  • A Magnetic Broadband Electromagnetic Absorbing Metamaterial
  • A Magnetic Broadband Electromagnetic Absorbing Metamaterial
  • A Magnetic Broadband Electromagnetic Absorbing Metamaterial

Examples

Experimental program
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Effect test

preparation example Construction

[0032] The preparation method of the electromagnetic wave absorbing metamaterial comprises the following steps:

[0033] (1), paste the reflective layer on one side of the dielectric layer;

[0034] (2) Grind out the sticking area corresponding to the position of each magnetic structural unit on the side of the dielectric layer away from the reflective layer. The shape of the sticking area matches the shape of the bottom surface of the magnetic structural unit. The roughness is less than 40μm;

[0035] (3), sticking or spraying magnetic structural units at the positions of each sticking area to form an array layer, that is, to obtain an electromagnetic wave absorbing metamaterial.

[0036] Wherein, in step (3), the method for fixing each magnetic structural unit to the application area is spraying process, mold compression molding or 3D printing.

[0037] The specific method of fixing each magnetic structural unit on the application area by spraying process is as follows: fi...

Embodiment 1

[0040] Magnetic Broadband Electromagnetic Absorbing Metamaterials, please refer to figure 1 , the electromagnetic wave-absorbing metamaterial includes a three-layer structure: the bottom layer is a copper film reflective layer, the middle layer is a FR-4 board dielectric layer, and the upper layer is an array layer composed of a plurality of magnetic structural units arranged in a rectangular array at intervals, Electromagnetic waves are incident in the Z direction from the top layer.

[0041] The magnetic structural unit is a mixture of FeCo alloy and adhesive, and its electromagnetic parameters are as follows figure 2 shown. The magnetic structural unit is a cylinder with a diameter of 8 mm and a height of 2 mm. The distance between two adjacent magnetic structural units in the array layer is 12 mm. The dielectric layer is an FR-4 board with a dielectric constant of 4.3, and the thickness of the dielectric layer is 2 mm. , the thickness of the copper film reflective layer...

Embodiment 2

[0048] Magnetic broadband electromagnetic wave-absorbing metamaterial, the electromagnetic wave-absorbing metamaterial includes a three-layer structure: the bottom layer is a copper film reflective layer, the middle layer is a polyester film dielectric layer, and the upper layer is a plurality of magnetic magnetic layers arranged at intervals in a rectangular array. An array layer composed of structural units, and electromagnetic waves are incident along the Z direction from the top layer.

[0049] The magnetic structural unit is a mixture of FeCo alloy and adhesive, and its electromagnetic parameters are as follows figure 2 shown. The magnetic structural unit is a cylinder with a diameter of 8 mm and a height of 2 mm. The distance between two adjacent magnetic structural units in the array layer is 12 mm. The dielectric layer is a polyester film with a dielectric constant of 3.3, and the thickness of the dielectric layer is 2 mm. The thickness of the copper film reflective ...

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Abstract

The invention discloses a magnetic broadband electromagnetic wave absorbing metamaterial. The electromagnetic wave absorbing metamaterial includes three layers from bottom to top: a reflective layer, a medium layer and an array layer. It is composed of magnetic structural units arranged above the dielectric layer; the preparation method of the electromagnetic wave absorbing metamaterial is as follows: paste a reflective layer on one side of the dielectric layer; The sticking area corresponding to the position, the shape of the sticking area matches the shape of the bottom surface of the magnetic structural unit, and the roughness of the sticking area is less than 40 μm; stick or spray the magnetic structural unit at the position of each sticking area to form an array layer, namely the electromagnetic wave absorbing metamaterial. The electromagnetic wave-absorbing metamaterial has excellent broadband wave-absorbing performance in the range of 2-18 GHz, and can be applied to electronic equipment, aircraft, ships, military vehicles and the outer surfaces of facilities.

Description

technical field [0001] The invention relates to the field of special functional materials, in particular to a magnetic broadband electromagnetic wave absorbing metamaterial. Background technique [0002] Metamaterials are a new type of artificial materials that have been vigorously developed at home and abroad in recent years. They can realize extraordinary physical properties that are not available in nature through artificial design, and also provide an unprecedented new idea for the development of wave absorbing materials. Electromagnetic absorbing metamaterial is an artificial electromagnetic material composed of periodically arranged structural units with sub-wavelength scale that can absorb electromagnetic waves. Since N.I.Landy researched and prepared perfect absorbing metamaterials in 2008, electromagnetic absorption Metamaterials have been extensively studied and developed. [0003] The Chinese patent with publication number CN103018926A discloses a kind of artific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/00B32B15/08B32B15/09B32B15/18B32B15/20B32B27/00B32B27/28B32B27/36B32B9/00B32B9/04B32B3/08
CPCB32B15/18B32B15/20B32B15/00B32B15/08B32B15/09B32B27/36B32B27/365B32B27/00B32B27/281B32B27/12B32B5/02B32B3/08B32B2262/106
Inventor 庄海燕陈翔叶志民赵涵陈小平
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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