A dual-band anisotropic coded supersurface with co-aperture design

Abstract

The invention discloses a dual-band anisotropic coded supersurface with co-aperture design. The basic unit structure of the supersurface comprises a right-angle metal structure (1), a cross-shaped metal structure (2), a dielectric layer (3) and a metal back plate (4). Wherein the plane of the dielectric layer (3) is square, a cross-shaped metal structure (2) is arranged in the center of the uppersurface thereof, a right-angle structure (1) is respectively arranged at four corners of the upper surface thereof, and a metal back plate (4) is arranged in the lower surface thereof. The supersurface comprises more than one sub-cell array, the sub-cell array is composed of M * N basic cell structure, M and N are non-zero positive integers; The subunit array is arranged on a two-dimensional planeaccording to a corresponding digital coding matrix, and has different electromagnetic responses under the illumination of incident waves with different frequencies and polarizations. The dual-band anisotropic coded supersurface with co-aperture design has the advantages of simple structure and easy machining, and the same super surface can realize multiple functions independently.

Description

technical field [0001] The invention relates to a novel artificial electromagnetic material, in particular to a dual-band anisotropic coded metasurface designed with a common aperture. Background technique [0002] Electromagnetic metamaterials (Metamaterials) are an artificial material formed by periodically / aperiodically arranging macroscopic basic units with specific geometric shapes, or implanting them into the matrix material (or surface). The difference between electromagnetic metamaterials and traditional materials is that the original microscopic units (atoms or molecules) are replaced by macroscopic units. Although the unit sizes of the two are quite different, their responses to external electromagnetic waves are reflected by the interaction between the basic unit resonant system and the external electromagnetic field. In the past 20 years, electromagnetic metamaterials have been widely studied and applied to control electromagnetic waves, resulting in many surpri...

AI Technical Summary

Problems solved by technology

However, the previous anisotropic and dual-band coding metasurfaces are only dual-functional designs. Anisotropic coding metasurfaces can only work in a single frequency band, while dual-band coding metasurfaces can only work in characteristic line poles. incident wave

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