Metamaterial wave absorber

Abstract

The invention relates to a metamaterial wave absorber, and the wave absorber comprises a plurality of wave absorbing units. Each wave absorbing unit comprises a metal backboard, a dielectric substrateand a resistive film three-dimensional structure, wherein the metal backboard is arranged on one surface of the dielectric substrate, the resistive film three-dimensional structure is embedded in thedielectric substrate, and the resistive film three-dimensional structure comprises four first resistive films, a first square ring resistive film, four second resistive films and a second square ringresistive film; every two adjacent first resistive films are perpendicularly connected in a crossed mode to form a first #-shaped structure in a three-dimensional space. The first square ring resistive films penetrate through the first #-shaped structure and are connected with the first resistive films in a crossed mode, and the plane where the first square ring resistive films are located is perpendicular to the plane where the first resistive films are located; similarly, a second #-shaped structure is obtained, and the second #-shaped structure is arranged in the wellhead of the first #-shaped structure. The wave absorber disclosed by the invention can realize a good broadband absorption effect, and has good wide incident angle stability and polarization insensitivity.

Description

technical field [0001] The invention relates to the technical field of metamaterials, in particular to a metamaterial absorber. Background technique [0002] Metamaterials are a new type of artificial electromagnetic materials, which are composed of supramolecular structures arranged in subwavelength periods, and have extraordinary electromagnetic properties that natural materials do not have. By utilizing the electromagnetic response of the unit structure on the basis of unit structure design and periodic arrangement, a series of exotic electromagnetic properties are obtained, such as negative refractive index, perfect imaging and invisibility cloak, etc. [0003] At present, metamaterials have been realized in different electromagnetic frequency bands from microwave to visible light. As an important application field of metamaterials, metamaterial absorbers have attracted extensive attention from scholars all over the world in recent years. Most of the metamaterial absor...

AI Technical Summary

Problems solved by technology

Most of the metamaterial absorbers currently studied are mostly two-dimensional structures. Even the absorbers with three-dimensional structures are based on metal materials. Metal-based metamaterial absorbers have the disadvantage of narrow absorption frequency bands.

In addition, traditional metamaterial absorbers still have problems such as poor absorbing effect for oblique incidence, which greatly reduces the value of absorbing materials or absorbing structures in practical applications.

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