Multifunctional multi-stage metamaterial suitable for multi-band electromagnetic waves and inspired by surface structure of abalone shell pearl layer

Abstract

The invention discloses a multifunctional multi-stage metamaterial suitable for multi-band electromagnetic waves and inspired by the surface structure of an abalone shell pearl layer. The multifunctional multi-stage metamaterial comprises a bottom layer, a middle layer and a top layer. The bottom layer is of a protruding array structure of independent distribution which is formed by machining a flat plate absorber, the period can be adjusted within the range of 1-15 mm, the height is not larger than 1 mm, a gap exists between every two adjacent protrusions, and the width of each gap is 0.1 mm.The microwave absorption performance of the processed bionic array is greatly improved compared with that of the bionic array before processing. And the middle layer and the top layer are processed into convex structures. After processing, the middle layer and the top layer are overlapped, so that the infrared emissivity can be reduced, and the energy-saving purpose is achieved. Meanwhile, the influence of the middle layer and the top layer on bottom-layer microwave absorption can be ignored. And the microstructures on the top layer are arranged outwards, so that the effect of reducing lightpollution can be achieved. And the top layer can also be placed in front of the color-changeable LED lamp beads to realize color-changeable display. The microstructures of the middle layer and the toplayer can also scatter ultraviolet light, and the anti-aging purpose is achieved. And the microstructure of the top layer has hydrophobic property and can induce a self-cleaning effect.

Description

technical field [0001] The invention relates to a multi-level metamaterial, in particular to a bionic multi-level metamaterial with multi-frequency band electromagnetic wave adaptability and multi-functionality and a surface structure of abalone shell pearl layer. Background technique [0002] The traditional shell bionic technology has been studied, but it mainly focuses on its multi-layer structure or mechanical properties. There is no bionic technology for its surface microstructure, and all the current shell bionic related technologies are only used in the visible light band and in the field of mechanics. . However, there is no research on the multi-level modeling of this structure, and the adaptation of absorption, reflection, interference, and scattering in different wave bands through the multi-level structure arrangement, and no consideration has been given to the common use of related materials and this structure. effect, while its application in microwave anti-ref...

AI Technical Summary

Problems solved by technology

[0002] The traditional shell bionic technology has been studied, but it mainly focuses on its multi-layer structure or mechanical properties. There is no bionic technology for its surface microstructure, and all the current shell bionic related technologies are only used in the visible light band and in the field of mechanics.

However, there is no research on the multi-level modeling of this structure, and the adaptation of absorption, reflection, interference, and scattering in different wave bands through the multi-level structure arrangement, and no consideration has been given to the common use of related materials and this structure. effect, while its application in microwave anti-reflection and its synergy in different frequency bands has not been considered

[0003] And at present, electromagnetic wave control materials have been studied in a single band. For example, in order to reduce electromagnetic pollution, reduce infrared radiation (energy saving), reduce urban light pollution, etc., there are already corresponding microwave absorbing materials, low infrared emissivity materials, and visible light anti-reflection materials. It has been developed, but these studies are only limited to a single frequency band, and it is difficult to achieve compatibility and adaptability to different frequency bands. The reason is that there will be contradictions in the electromagnetic wave regulation performance of different frequency bands on the same material, such as microwave absorption and reduction of infrared radiation. Microwave absorption requires materials to absorb electromagnetic waves as much as possible, while reducing infrared radiation requires materials to reflect electromagnetic waves as much as possible, and it is difficult to achieve compatibility between the two

At the same time, due to the fact that the material is exposed to sunlight all the year round, on the one hand, the problem of its aging due to ultraviolet radiation needs to be solved urgently; Therefore, the surface of the material needs to be hydrophobic to induce the self-cleaning effect

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