A kind of concave-convex curved carpet invisibility cloak and design method thereof

Abstract

The invention discloses a concave-convex curved carpet invisibility cloak and a design method thereof. The concave-convex curved carpet invisibility cloak is composed of M*N metasurface units that are periodically extended and arranged at equal intervals in space. The unit includes a three-layer structure from top to bottom, the first layer is an ultra-thin dielectric plate printed with double-ring metal resonators, the second layer is a resin dielectric layer, and the third layer is an ultra-thin metal plate; is formed on the resin medium layer, and the ultra-thin metal plate is conformally formed at the bottom of the resin medium layer; the resin medium layer is a curved surface structure, which is prepared and processed by 3D printing technology; One side of the ultra-thin dielectric board is printed with double-ring metal resonators by PCB technology, and the other side is fully corroded. The carpet stealth cloak of the present invention can be conformal to a cloaked target with any shape, and can also avoid the edges and corners generated at the splicing position of the existing two-dimensional plane splicing structure from affecting the working performance of the carpet stealth cloak.

Description

technical field [0001] The invention relates to the technical field of metasurface stealth, in particular to a concave-convex curved carpet stealth cloak and a design method thereof. Background technique [0002] Metasurfaces have received extensive attention in the field of electromagnetic engineering due to their unique electromagnetic properties and powerful electromagnetic manipulation capabilities. Compared with three-dimensional metamaterials, metasurfaces have the advantages of thin profile, light weight, easy commonality and easy integration, which have been applied in the design of various electromagnetic devices and the improvement of equipment combat effectiveness, such as superlenses and polarization converters. and vortex beamformers, etc. Among them, in order to improve the combat effectiveness and survivability of the equipment on the battlefield, the radar stealth technology based on the hypersurface provides the possibility for the equipment to find and des...

AI Technical Summary

Problems solved by technology

[0003] However, due to the limitation of engineering processing technology, most of the reported metasurface carpet cloaks are spliced ​​by two-dimensional planar structures, and the edges and corners generated at different splicing positions seriously affect the working performance of carpet cloaks.

Even though there have been reports on the vaulted carpet cloak, the cloak still cannot achieve the invisibility of the concave shape target

More importantly, this stitching structure cannot achieve conformality with cloaked targets with arbitrary shapes, which severely limits the application of metasurface carpet cloaks in complex electromagnetic environments.

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