Two-dimensional left-handed material with T-shaped central symmetric structure

Abstract

The invention discloses a two-dimensional left-handed material with a T-shaped central symmetric structure. The two-dimensional left-handed material comprises a unit structure, wherein the unit structure comprises a dielectric substrate, the dielectric constant of the dielectric substrate is 3.48+ / -0.05, the loss tangent value is 0.0037, the dielectric substrate is square, the length of a side is2.0-2.2 millimeters, the thickness of the dielectric substrate is 0.43 millimeter, central symmetric T-shaped structure plating copper is plated at one side of the dielectric substrate, the T-shaped structure is formed by vertically intersecting two rectangular plating copper structures, the unit structure extends and expands along a three-dimensional direction and is connected to form a T-shapedstructure array, the T-shaped structure array is set to be an ideal magnetic boundary condition PHC along an X-axis direction and is set to be an ideal conductor boundary condition PEC along a Z-axisdirection, an electromagnetic wave irradiates along a Y-axis direction, an excitation mode employs wave impedance excitation, and the two-dimensional left-handed material has left-handed characteristic on the Y-axis and Z-axis directions.

Description

technical field [0001] The invention relates to the field of metamaterials, in particular to a two-dimensional left-handed material with a T-shaped centrosymmetric structure. Background technique [0002] Veselago proposed the concept of left-handed materials in 1968, and pointed out that its permittivity and magnetic permeability are negative at the same time in a certain electromagnetic wave frequency band, and has many strange electromagnetic properties such as negative refraction, perfect lens effect, inverse Doppler effect, etc. . It is precisely because of these special electromagnetic properties that left-handed materials have extensive and important applications in the fields of optical imaging, antenna systems, microwave devices, and electromagnetic stealth. However, this theory was not realized for the first time by Smith in the form of a combination of metal wire and split resonator ring until thirty years later. Since then, the study of left-handed materials ha...

AI Technical Summary

Problems solved by technology

However, the existing multidimensional left-handed materials often have problems such as complex structure, narrow bandwidth, large loss, and double-sided printing of circuit boards. Therefore, new multidimensional left-handed materials with excellent performance, simple structure, and easy processing have become an important research direction.

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