Metamaterial with low-frequency negative magnetic permeability

Abstract

The invention discloses a metamaterial with low-frequency negative magnetic permeability. The metamaterial comprises a resonant coil, a dielectric substrate and a resonant capacitor. The resonant coil comprises planar, square and spiral metal wires, is connected with the resonant capacitor and is positioned on one surface of the dielectric substrate, and the resonant capacitor is positioned on the other surface of the dielectric substrate. Electromagnetic response can be generated by the resonant coil and the resonant capacitor when electromagnetic waves are transmitted onto the metamaterial, the metamaterial has characteristics of equivalent negative magnetic permeability characteristics around working frequencies, the resonant coil comprises the planar, square and spiral metal wires, the number of turns of the coil is 2-6, the distances between the metal wires range from 0.2 mm to 4.0 mm, the widths of the metal wires range from 0.5 mm to 5.0 mm, the magnitude of the resonant capacitor ranges from 10 pF to 100 pF, and accordingly the working frequencies of the metamaterial range from 13.55 MHz to 14.47 MHz. The metamaterial, has the advantages that the energy transmission distances can be extended, the energy transmission efficiency can be improved, and the metamaterial is thin and small.

Description

technical field [0001] The invention belongs to the technical field of electrical and electromagnetic new materials, and in particular relates to a metamaterial with low-frequency negative magnetic permeability. Background technique [0002] There is a certain relationship between the refractive index of a substance and the magnetic permeability and permittivity of the substance, that is, n 2 =ε(ω)μ(ω), obviously, when the magnetic permeability and permittivity are negative at the same time, the refractive index n<0. Based on this idea, Russian scientist Victor Veselago called a substance with a negative refractive index a metamaterial, also known as a supermedium. According to different application fields, metamaterials can be divided into double-negative metamaterials with negative permittivity and permeability, magnetic single-negative metamaterials with negative permeability, and electronegative metamaterials with negative permittivity. Super material. [0003] Sin...

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Problems solved by technology

[0005] In view of the above defects, the present invention provides a metamaterial with low frequency negative magnetic permeability to solve the technical problem of high operating frequency of traditional negative magnetic permeability metamaterials

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