Diffuse reflecting device based on metamaterial
A metamaterial, diffuse reflection technology, applied in electrical components, antennas, etc., can solve the problems of complex process and difficult implementation, and achieve the effect of simple process
Active Publication Date: 2014-12-24
KUANG CHI INST OF ADVANCED TECH +1
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Problems solved by technology
However, it is not the only way to change the permittivity and permeability of each point of the metamaterial, and it is not the only way to arrange artificial metal microstructures on the metamaterial substrate, and the process of arranging artificial metal microstructures on the metamaterial substrate is complex and difficult to realize difficulty
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[0023] The metamaterial as a whole can be regarded as a plurality of cubic structural units superimposed along the three-dimensional X-Y-Z direction. Since the metamaterial itself needs to affect electromagnetic waves, the size of the three-dimensional structural unit is required to be smaller than one-fifth of the wavelength of the electromagnetic wave that needs to be responded. Preferably, each cubic structure unit has the same size and is one-tenth of the wavelength of the electromagnetic wave required to respond.
[0024] The response of metamaterials to the electromagnetic field mainly depends on the response of each cubic structural unit to the electromagnetic field. When the number of cubic structural units is large enough, the response of each cubic structural unit to the electromagnetic field will be superimposed to change the physical characteristics of the incident electromagnetic wave macroscopically.
[0025] Those skilled in the art know that when a beam of elec...
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The invention relates to a diffuse reflecting device based on a metamaterial, which comprises a metamaterial and a reflecting layer arranged at the upper middle part on one side of the metamaterial, wherein the metamaterial comprises a plurality of cubic structure units overlapped along the three-dimensional direction, the size of each cubic structure unit is smaller than one fifth of the wavelength of electromagnetic waves, each cubic structure unit comprises a base material and one or more small holes formed in the base material, and the dielectric constant and the magnetic conductivity of each cubic structure unit are randomly distributed. The electromagnetic parameter in each point of the metamaterial is changed in a punching way so that the quantity of the electromagnetic fields in the entire metamaterial is randomly distributed, and the electromagnetic waves pass through the matamaterial, are reflected by the reflecting layer and then pass through the metamaterial once again to form diffuse reflection. The diffuse reflecting device has the advantages of simple technology, low cost and easiness in realization.
Description
technical field [0001] The invention relates to a diffuse reflection device, in particular to a metamaterial-based diffuse reflection device. Background technique [0002] Diffuse reflection refers to the phenomenon that electromagnetic waves are randomly reflected in all directions by a rough surface. The surface of many objects, such as plants, walls, clothes, etc., seems to be smooth at first glance, but if you look closely with a magnifying glass, you will see that the surface is uneven, so the originally parallel sunlight is reflected by these surfaces. shoot in different directions. However, it is difficult to use the above materials for long-wavelength electromagnetic waves to cause diffuse reflection. It is necessary to change the physical shape of the material so that the surface forms a larger zigzag shape to achieve diffuse reflection of long-wavelength electromagnetic waves. The surface shape of the material and Thickness is limited. [0003] Metamaterials ref...
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IPC IPC(8): H01Q15/00H01Q15/23
Inventor 刘若鹏徐冠雄季春霖岳玉涛
Owner KUANG CHI INST OF ADVANCED TECH