Composite three-dimensional ultra-wide-band metamaterial transparent wave absorber

An ultra-bandwidth and metamaterial technology, applied in the field of metamaterial transparent absorbers, can solve the problem that absorbers cannot take into account broadband absorption and high visible light transmittance.

Inactive Publication Date: 2019-12-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: conventional absorbers cannot take into account the problems of broadband absorbing and high visible light transmittance. The present invention provides a composite three-dimensional super-bandwidth metamaterial transparent absorber that solves the above problems , especially suitable for the visualization window of the electronic non-parking toll collection system

Method used

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  • Composite three-dimensional ultra-wide-band metamaterial transparent wave absorber

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Embodiment 1

[0042] The present invention provides a composite three-dimensional ultra-broadband metamaterial transparent absorber, which includes a plurality of structural units 1, and the plurality of structural units 1 are periodically and continuously distributed in two dimensions. Each structural unit 1 includes a lower structure, a middle structure and an upper structure from bottom to top; the middle structure includes four hollow cylinder units 11, and the four hollow cylinder units 11 are arranged in a rectangular array; each hollow cylinder unit 11 A regular N-gon hollow cylinder structure with rotational symmetry is a cylinder structure with a certain depth and height, wherein N is an even number, and N≥4; the side wall of the hollow cylinder structure serves as the supporting layer 111, and the inner side The conductive film layer 112 is attached; the upper structure includes a frequency selective surface 14, and the frequency selective surface 14 covers the upper surface of the...

Embodiment 2

[0045] The present invention provides a composite three-dimensional super-bandwidth metamaterial transparent absorber, which is further improved on the basis of Example 1. The absorber is continuously distributed with more than 20 structural units 1 in both directions. , all structural units are distributed in a rectangular array. Each structural unit can be completely overlapped when it is rotated 90°, 180°, 270°, 360° along its geometric center point in the plane. The structure of each part is as follows:

[0046](1) Hollow cylinder unit: The angle between the axial direction of the hollow cylinder unit 11 and the surface of the substrate layer 12 is 90°, and the hollow cylinder structure adopts a cube, honeycomb prism or cylinder structure.

[0047] The interval between adjacent hollow cylinder units 11 in the same plane is w, and it satisfies 0.8λ≥w≥0.1λ; the maximum dimension of the hollow cylinder units 11 in the electric field polarization direction is L, and 1.2λ≥L ≥...

Embodiment 3

[0053] The present invention provides a composite three-dimensional ultra-bandwidth metamaterial transparent absorber, which is further improved on the basis of Example 1. In this case, the shortest wavelength λ is 6mm, and the structural design of each component is as follows:

[0054] The size of the structural unit p=4λ;

[0055] The maximum size L of the hollow cylinder unit in the electric field polarization direction is 1.4λ;

[0056] The height of the hollow cylinder unit h=2λ;

[0057] The gap between adjacent hollow cylinder units in the same plane w=0.67λ;

[0058] The thickness of the support layer is g 3 =0.001λ;

[0059] The thickness of the conductive film layer is g 0 = 0.0016λ;

[0060] The gap width at the fracture of the strip frequency selective surface g=0.017λ;

[0061] The thickness of the frequency selective surface g 2 = 0.0016λ;

[0062] Thickness of backplane layer g 1 =0.001λ;

[0063] The thickness of the substrate layer d=0.01λ.

[0064]...

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Abstract

The invention discloses a composite three-dimensional ultra-wide-band metamaterial transparent wave absorber, which comprises a plurality of structural units. The structural units are periodically andcontinuously distributed in two dimensions; each structural unit sequentially comprises a lower-layer structure, a middle-layer structure and an upper-layer structure from bottom to top; the middle-layer structure comprises four hollow cylinder units, and the four hollow cylinder units are arranged in a rectangular array; each hollow cylinder unit is of a rotationally symmetrical regular N-polygon hollow cylinder structure; the side wall of the hollow cylinder structure serves as a supporting layer, and a conductive film layer is attached to the inner side; the upper-layer structure comprisesa frequency selection surface; the lower-layer structure comprises a substrate layer and a back plate layer; and the structural units are made of transparent materials. According to the wave absorberprovided by the invention, the problem that the existing wave absorber cannot give consideration to broadband wave absorption and high visible light transmittance is solved, and the design of novel transparent wave absorption is realized.

Description

technical field [0001] The invention relates to the technical field of metamaterials, in particular to a composite three-dimensional super-bandwidth metamaterial transparent absorber. Background technique [0002] Metamaterial absorbers can absorb and attenuate incident electromagnetic waves and convert them into heat energy consumption. Due to their unique perfect absorption characteristics, metamaterial absorbers have been widely used in electromagnetic compatibility and other fields. [0003] Some electronic and electrical equipment such as electronic non-parking toll collection systems and radio frequency identification systems require not only the ability to absorb electromagnetic waves, but also the corresponding light-transmitting ability to visible light. However, based on the inherent absorption principle of traditional absorbers, materials with high light transmittance often have narrow absorption bands, while materials with wide absorption bandwidths have low ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/00
Inventor 杨伟江浩李从周胡皓全雷世文陈波包永芳何子远唐璞
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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