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Metamaterial

A metamaterial and torus technology, applied in the electromagnetic field, can solve problems such as poor lens performance, achieve excellent performance and reduce refraction

Active Publication Date: 2013-01-30
KUANG CHI INST OF ADVANCED TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-performance metamaterial for the defects of the prior art that the above-mentioned refraction, diffraction and reflection are relatively large and the performance of the lens is poor.

Method used

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Embodiment Construction

[0029] figure 2 It is a schematic diagram of a metamaterial converging electromagnetic waves according to an embodiment of the present invention. The metamaterial 10 with the function of converging electromagnetic waves is used to convert the electromagnetic waves emitted by the radiation source 20 into plane waves.

[0030] As common knowledge, we know that the refractive index of electromagnetic waves is related to In direct proportion, when a beam of electromagnetic wave propagates from one medium to another medium, the electromagnetic wave will be refracted. When the refractive index distribution inside the material is non-uniform, the electromagnetic wave will be deflected to a position with a relatively large refractive index. Through By designing the electromagnetic parameters of each point in the metamaterial, the refractive index distribution of the metamaterial can be adjusted, thereby achieving the purpose of changing the propagation path of electromagnetic waves....

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Abstract

The invention relates to metamaterial. The metamaterial includes a plurality of concentric rings which have lateral curved surfaces and attach to one another tightly. The bottom radius of each ring is smaller than the top radius. An included angle between a straight line perpendicular to the metamaterial and a connecting line of a radiation source and a point at the bottom of the ring i is theta. The included angle theta only corresponds to a curved surface of the ring I, and the positions on the curved surface only corresponding to the included angle theta are equal in refractive index. The refractive index of each ring decreases with increase of the include angle theta. Jumps of the refractive index of the metamaterial are curved, so that refraction, diffraction and reflection effects of the jumps are reduced greatly. The problems caused by mutual interference are solved, and the metamaterial has better properties.

Description

technical field [0001] The present invention relates to the field of electromagnetism, and more specifically, to a metamaterial. Background technique [0002] In conventional optical devices, a lens can make the spherical wave radiated by a point light source located at the focal point of the lens become a plane wave after being refracted by the lens. At present, the convergence of the lens is realized by the refraction of the spherical shape of the lens, such as figure 1 As shown, the spherical wave emitted by the radiator 30 is converged by the spherical lens 40 and then emitted as a plane wave. In the process of implementing the present invention, the inventor found that the lens antenna has at least the following technical problems: the spherical lens 40 is bulky and heavy, which is not conducive to the use of miniaturization; Realize the directional propagation of the antenna; the electromagnetic wave reflection interference and loss are relatively serious, and the el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q15/02
Inventor 刘若鹏季春霖岳玉涛
Owner KUANG CHI INST OF ADVANCED TECH
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