Adaptable to multiple waves and multifunctional biomimetic wave-absorbing metamaterials inspired by the helical structure of scarab carapace

Abstract

The invention discloses a multifunctional b ionic wave-absorbing metamaterial which is inspired by spiral structures of scarab carapaces and is suitable for various waves. The multifunctional b ionicwave-absorbing metamaterial comprises a plurality of unit layers, the adjacent layers are separated by a matrix, and periodically arranged structural units are distributed on each layer; each layer ofthe structural units is twisted by a certain angle relative to the structural units on the upper layer, the periodic size of the structural units is smaller than 15 mm and is adjustable, and the thickness of each layer of the matrix is smaller than 2 mm and is adjustable. Serious electromagnetic wave loss is generated after the structural units are twisted, so that the material microwave absorption performance is enhanced. The structural units are made of a high-entropy alloy prepared from five elements of Fe, Co, Ni, Si, Al and the like, has very strong dielectric loss and magnetic loss on electromagnetic waves, and has excellent corrosion resistance. The matrix material is an elastic foam material with a porous structure, and has multiple wave adaptability and multifunctionality of absorbing sound waves, ultrasonic waves and water waves, elastically deforming, resisting impact, preventing explosion and the like while the microwave absorption performance of the periodic units is notinfluenced.

Description

technical field [0001] The invention relates to a wave-absorbing metamaterial, in particular to a bionic helical chiral metamaterial adaptable to various waves and multi-functions. Background technique [0002] The highly developed microwave communication technology in modern society has brought convenience to human beings, but it has also brought electromagnetic wave pollution. Therefore, researchers have studied microwave absorbing materials to solve this problem, but the absorption performance of traditional flat absorbing materials is limited. Although the performance of metamaterials formed by constructing ordinary periodic structures is higher than that of flat plate structures, how to further improve the absorption performance of ordinary periodic structures has become a bottleneck problem for microwave absorbing materials. Moreover, traditional microwave absorbing materials have been unable to be used in devices in marine environments. For example, due to the strong ...

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Problems solved by technology

[0002] The highly developed microwave communication technology in modern society has brought convenience to human beings, but it has also brought electromagnetic wave pollution. Therefore, researchers have studied microwave absorbing materials to solve this problem, but the absorption performance of traditional flat absorbing materials is limited. Although the performance of metamaterials formed after the construction of ordinary periodic structures is improved compared with that of flat plate structures, how to further improve the absorption performance of ordinary periodic structures has become a bottleneck problem for microwave absorbing materials.

Moreover, traditional microwave absorbing materials have been unable to be used in devices in marine environments. For example, due to the strong corrosiveness of marine environments, carbonyl iron or other pure iron microwave absorbing materials, which are the most widely used traditionally, cannot be applied. Most of the non-ferrous materials It does not have magnetic properties, and a few with magnetic properties are far away from iron. Its microwave absorption effect is not good, so it cannot be applied. Decisive factors for applications in the marine environment

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