K-waveband electromagnetic double-negative metamaterial

Abstract

The invention relates to a K-waveband electromagnetic double-negative metamaterial, which comprises a dielectric substrate, a novel resonator and a rectangular metal lead wire, wherein the novel resonator and the rectangular metal lead wire cover the dielectric substrate; the novel resonator comprises a structure whose inside is a closed regular triangle combined by three metal strips and outside is a regular hexagon with three openings; the closed triangle is coincided with three vertexes of the hexagon; and each of the three vertexes, which are not coincided with the triangle, of the hexagon is provided with one opening, overall representing a back-to-back combination of three small resonant cavities. Based on the traditional structure combined with the resonant cavities and the rectangular metal lead wire, the novel resonator is proposed; according to the resonator, through a manner of parallel connection of the relatively small resonant cavities, the resonant frequency is improved, and a novel double-negative material is formed by combining with the rectangular metal lead wire; the material not only realizes the double-negative characteristic at 18.8Ghz (K-waveband), but also guarantees the radiating area, so that the material can have the better double-negative characteristic when being applied to an electromagnetic device.

Description

technical field [0001] The invention relates to an electromagnetic double-negative metamaterial, in particular to a K-band electromagnetic double-negative metamaterial realized in a conventional size, and belongs to the field of electromagnetic "metamaterial" structure design. Background technique [0002] Electromagnetic double negative material is a synthetic metamaterial whose permittivity and magnetic permeability are negative at the same time. Its electric field vector, magnetic field vector, and wave vector components satisfy the left-hand rule, so it is also called left-handed material. One of the differences between double negative materials and other materials in nature is that the group velocity is opposite to the direction velocity when electromagnetic waves propagate in it. This abnormal electromagnetic property makes double negative materials present many supernatural physical phenomena, such as the inverse Doppler effect, Negative refraction phenomenon, perfect...

AI Technical Summary

Problems solved by technology

Solve the problem that the current double negative material has a double negative characteristic when the frequency is too high and the size is too small to be applied

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