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Combined wave-absorbing composite material with advantages of various types of metamaterials

A technology of composite materials and metamaterials, which is applied in the field of combined wave-absorbing composite materials, can solve the problems of limited practical application and narrow bandwidth of metamaterial wave-absorbing bodies, so as to facilitate industrial production and promotion, reduce performance requirements, and reduce costs Effect

Active Publication Date: 2021-06-04
ZHONGBEI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thickness of the pyramid-like all-dielectric metamaterial absorber is about 10 mm, while the bandwidth of the two-dimensional metasurface metamaterial absorber is relatively narrow.
Therefore, the practical application of a single type of metamaterial absorber is very limited

Method used

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  • Combined wave-absorbing composite material with advantages of various types of metamaterials
  • Combined wave-absorbing composite material with advantages of various types of metamaterials
  • Combined wave-absorbing composite material with advantages of various types of metamaterials

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Embodiment

[0038] This example is figure 1 As shown, the combined absorbing composite material with the advantages of various types of metamaterials arranged by several periodic unit structures, the overall structure size can be increased according to the needs of the application, but the minimum number of units should be greater than or equal to 4 (more than or equal to 2 horizontally and vertically).

[0039] Such as figure 2 and image 3 As shown, the periodic unit structure should include a metal substrate 1, a lower absorber 2, a second upper absorber 4 and a first upper absorber 5, a metal square ring 3 laid between the two layers and a metal sheet laid on the top 6.

[0040] The metal substrate 1 provides support and microwave reflection for the entire combined microwave-absorbing composite material, and generates parallel or opposite currents with the above-mentioned metal wire 3 and metal sheet 6, thereby forming electromagnetic resonance. Its size is equal to the bottom su...

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Abstract

The invention belongs to the technical field of electromagnetic functional materials, and particularly relates to a combined wave-absorbing composite material with the advantages of various types of metamaterials. The composite material comprises a metal substrate, an array of wave absorbing units is arranged on the metal substrate, each row at least comprises two wave absorbing units, and each column at least comprises two wave absorbing units; each wave absorbing unit comprises a lower-layer wave absorbing body, and a metal wire, a first upper-layer wave absorbing body and a top metal sheet are sequentially laid at the central position of the upper surface of each lower-layer wave absorbing body from bottom to top; a second upper-layer wave absorbing body is arranged on the periphery of each first upper-layer wave absorbing body on the upper surface of the corresponding lower-layer wave absorbing body; the lower-layer wave-absorbing bodies of all the wave-absorbing units are connected into a whole plate which is tightly attached to the upper surface of the metal substrate. The combined wave-absorbing composite material has low requirements on the loss capability of a wave-absorbing agent, has the characteristics of polarization insensitivity, wide incidence angle and the like, and has wide application in the fields of broadband stealth materials, electromagnetic shielding, wave-absorbing devices and the like.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic functional materials, and in particular relates to a combined wave-absorbing composite material having the advantages of various types of metamaterials. Background technique [0002] The emergence of metamaterials has made microwave absorbing materials a major breakthrough in the three aspects of "lightness, width, and thinness". For example, the invention of pyramid-shaped all-dielectric metamaterials has achieved a reduction in the weight of the absorber and an increase in the absorption bandwidth; The invention of the two-dimensional metasurface absorbing composite material has realized the reduction of the thickness of the absorber and the improvement of the absorbing strength. However, the thickness of the pyramid-like all-dielectric metamaterial absorber is about 10mm, while the bandwidth of the two-dimensional metasurface metamaterial absorber is relatively narrow. Therefore, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q17/00
CPCH01Q15/0086H01Q17/002H01Q17/00
Inventor 赵贵哲樊益泽韩冠宇苏晓岗刘亚青
Owner ZHONGBEI UNIV
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