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A metamaterial absorber

A wave absorber and metamaterial technology, applied in the direction of antennas, electrical components, etc., can solve problems such as narrow working bandwidth, low incident angle, and sensitivity to the polarization direction of incident electromagnetic waves

Active Publication Date: 2021-09-14
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a metamaterial absorber to solve the problems of narrow working bandwidth, sensitivity to incident electromagnetic wave polarization direction and low incident angle of traditional metamaterial absorbers

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The purpose of the present invention is to provide a metamaterial absorber, so that the metamaterial absorber provided by the present invention has the characteristics of polarization insensitivity, wide frequency band, and wide incident angle.

[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanyi...

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Abstract

The invention discloses a metamaterial absorber. The metamaterial absorber is composed of several periodic units, and each period unit includes: a metal layer at the bottom, a medium layer directly above the metal layer, and a The mixed layer composed of the metal patch directly above and the semiconductor material; the mixed layer located directly above the dielectric layer, except for the metal patch, is filled with the semiconductor material, where there is a gap between the semiconductor material and the metal patch structure; electromagnetic wave incident When reaching the surface of the metamaterial absorber, electromagnetic coupling and interaction will occur between the metal patch and the semiconductor material; the perfect absorption of electromagnetic waves of a specific frequency can be achieved by rationally designing the periodic size and geometric parameters of the unit structure. The metamaterial absorber of the invention has the advantages of simple structure, small volume, wide frequency band, high absorption, etc., wide incident angle and polarization insensitivity to incident electromagnetic waves.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorption and shielding, in particular to a metamaterial wave absorber. Background technique [0002] In recent years, due to its novel physical effects and potential application value, metamaterials have received extensive attention and have been applied in many new fields such as negative refraction materials, invisibility cloaks, perfect lenses and so on. According to the equivalent medium theory, the electromagnetic properties of metamaterials are expressed by equivalent permittivity and equivalent permeability. By rationally designing the period size and geometric parameters of the metamaterial, it can generate electric resonance and magnetic resonance with the incident electromagnetic wave, so as to control its equivalent permittivity and equivalent permeability accordingly. Through the modulation of the equivalent permittivity and equivalent permeability of the metamaterial, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00H01Q17/00
CPCH01Q15/0086H01Q17/008
Inventor 阮久福刘玉宝姬生伟张娜
Owner HEFEI UNIV OF TECH
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