Super-thin broadband wave-absorbing metamaterial

Abstract

The invention discloses super-thin broadband wave-absorbing metamaterial. The super-thin broadband wave-absorbing metamaterial comprises at least two layers of dielectric slabs which are laminated together. In the laminated dielectric slabs, a matching layer covers the upper surface of the dielectric slab at the top layer, a metal floor layer covers the lower surface of the dielectric slab at the bottom layer, and a non-closed annular metal layer further covers the upper surface of the dielectric slab at each layer. The non-closed annular metal layers located on the different dielectric slabs are same in shapes and mutually different in terms of sizes. The non-closed annular metal layers are distributed according to the pyramid structure, wherein the non-closed annular metal layer with the largest size is located on the dielectric slab at the bottom layer. According to the wave-absorbing metamaterial, due to the fact that electromagnetic parameters of each layer of structure are changed, phase positions of a reflected wave and a refracted wave are changed. Therefore, a final reflected wave and an incident wave are counteracted, so that the same effect that electromagnetic waves are absorbed by the metamaterial is achieved. Due to the fact that a metamaterial structure composed of the three dielectric slabs, three metal rings and the metal floor is adopted, the broadband wave-absorbing metamaterial is super-thin.

Description

technical field [0001] The invention relates to the technical field of metamaterial microwave absorption, in particular to an ultra-thin broadband microwave-absorbing metamaterial. Background technique [0002] Absorbing material refers to a class of materials that can absorb most of the energy of electromagnetic waves incident on its surface and convert these energy into other forms of energy with little reflection. With the wide application of absorbing materials in stealth technology, heat preservation and energy saving, and human body protection, their development is facing many new challenges, including ultra-thin and broadband problems based on existing technologies. Different from conventional materials, the physical properties of metamaterials do not mainly depend on their internal chemical composition, but on their internal specific metamaterial structures. The functions of these artificial structures are similar to the atoms and molecules of conventional materials ...

AI Technical Summary

Problems solved by technology

Although the method of increasing the lumped capacitance and resistance is a novel and applicable method, the use of this method is not conducive to the actual production

For terahertz, infrared, and light wave frequency bands, the structure of absorbing metamaterials is getting smaller and smaller, and this method of adding lumped elements to expand bandwidth is even more inappropriate.

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