Negative magnetic permeability metamaterial

A technology of negative magnetic permeability and metamaterials, applied in the field of metamaterials, can solve the problems of reduced resonant frequency and low resonant frequency of metamaterials, and achieve good development prospects

Active Publication Date: 2012-07-18
KUANG CHI INST OF ADVANCED TECH
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Problems solved by technology

At present, the geometric shape of the existing artificial microstructure is "I" shape or such as figure 1 The opening ring similar to the "concave" shape is shown, but none of these structures can achieve a magnetic permeability μ significantly less than 0 or significantly reduce the

Method used

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  • Negative magnetic permeability metamaterial

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] The present invention provides a negative magnetic permeability metamaterial, such as figure 2 As shown, it includes a dielectric substrate 2 and a plurality of artificial microstructures 1 fixed on the dielectric substrate. The plurality of artificial microstructures 1 are formed by nesting four Archimedean spirals at equal intervals from the inside to the outside. A single artificial microstructure 1. After rotating 90°, 180°, and 270° around its center of symmetry, it coincides with the artificial microstructure 1 before the rotation. For a schematic diagram of the artificial microstructure 1 of the present invention, see Figure 4 , the shape of the microstructure enables the metamaterial to be isotropic.

[0026] Here, the Archimedes spiral means that while a point P on the plane moves at a constant speed along the moving ray OP, the ray...

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Abstract

The invention relates to a negative magnetic permeability metamaterial comprising a dielectric substrate and a plurality of artificial micro-structures fixed on the dielectric substrate. The plurality of artificial micro-structures are formed by four Achimedean spirals embedded with a same spacing from inside to outside. Single artificial micro-structure being rotated by 90 degrees, 180 degrees and 270 degrees around a symmetric center coincides with the artificial micro-structure before rotation. In the negative magnetic permeability metamaterial, a frequency point of the negative magnetic permeability of the metamaterial can be changed by adjusting the turn number of a winding or scaling the size of the artificial micro-structure. Meanwhile, the artificial micro-structures of the metamaterial are symmetrical so that the response of the metamaterial to an electromagnetic wave in every direction is equal, and the negative magnetic permeability metamaterial is of significance in the development of a metamaterial industry and has good development prospects.

Description

technical field [0001] The invention relates to the field of metamaterials, in particular to a negative magnetic permeability metamaterial. Background technique [0002] At present, there have been a lot of research on magnetic permeability in the international community, among which the research on positive magnetic permeability has become mature, and the research on negative magnetic permeability metamaterials is now a hot research topic at home and abroad. Negative magnetic permeability has Quantum polarization can polarize incident waves, so it has a wide range of effects, such as magnetic resonance imaging in the field of medical imaging. Negative magnetic permeability materials can enhance the imaging effect of electromagnetic waves. In addition, negative magnetic permeability materials It also plays an important role in lens research. In the field of engineering, magnetic permeability usually refers to relative magnetic permeability, which is the absolute magnetic per...

Claims

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Application Information

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IPC IPC(8): H01Q15/00
Inventor 刘若鹏赵治亚郭洁余铨强
Owner KUANG CHI INST OF ADVANCED TECH
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