Ultra-wideband polarization conversion metasurface structure

Abstract

The invention discloses an ultra-wideband polarization conversion metasurface structure which comprises a triangular chessboard and two kinds of artificial electromagnetic surface (AMC) units. One AMCunit is arranged in the triangular chessboard according to a set period rule; wherein the two AMC units always have a phase difference of 180 degrees; each AMC unit comprises an outer double-V-shapedstructure and an inner double-V-shaped structure; the outer double-V-shaped structure comprises two large V-shaped structures which are located on the v-axis and are symmetrical about the u-axis, andopenings of the large V-shaped structures are oppositely arranged; wherein the u axis and the v axis are located on two diagonal lines of the AMC unit and are perpendicular to each other; the inner double-V-shaped structure is located in the outer double-V-shaped structure and comprises two small V-shaped structures which are located on the u axis and symmetrical about the v axis, and openings ofthe small V-shaped structures are oppositely arranged. According to the present invention, the linearly polarized wave can be converted into the orthogonally polarized wave within the ultra-widebandrange of 14.3 GHz to 43.2 GHz, and the PCR value is more than 90% within the range. Meanwhile, through the triangular chessboard structure arrangement, the ultra-wideband radar cross section (RCS) reduction of more than 10dB from 16.8 GHz to 37.3 GHz can be realized.

Description

technical field [0001] The invention relates to artificial electromagnetic materials, in particular to an ultra-broadband polarization conversion metasurface structure. Background technique [0002] Novel artificial electromagnetic materials (metamaterials) are artificial composite materials / structures with subwavelength periodic arrangements with widely tunable electromagnetic properties. Through metamaterials, people can realize the regulation of equivalent permittivity and permeability from "double positive" to "double negative", and then realize various abnormal effects such as negative refractive index, inverse Doppler effect, perfect transmission, etc. In recent years, researchers have made great progress in the mechanism research and practical application of metamaterials. [0003] New artificial electromagnetic surfaces (metamaterials) are two-dimensional ultra-thin planar arrays composed of subwavelength unit structures, which are the research hotspots of new artif...

AI Technical Summary

Problems solved by technology

Although some papers have proposed polarization switching devices with relatively wide bandwidth, their unacceptable thickness or complex structure may limit their practical applications

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