Two-dimensional left-handed material with shape like a Chinese character "tian"

Abstract

The invention discloses a two-dimensional left-handed material with a shape like a Chinese character "tian". The two-dimensional left-handed material comprises a unit structure formed by a dielectricsubstrate. The dielectric substrate is made of an epoxy resin board material with a dielectric constant of 4 to 4.8 and a loss tangent value of 0.02. The side length of the square dielectric substrateis 3.2 to 3.5 mm, and the thickness of the dielectric substrate is 0.8 mm. One side of the dielectric substrate is plated with a plated cooper part having the structure like a Chinese character "tian". The structure like a Chinese character "tian" is a central symmetry structure; the cross shape in the structure is formed by intersection of two rectangular copper plating structures; and the fourtop corners of the structure have no plated copper. The unit structure expands and extends respectively in a three-dimensional direction to realize mutual connection, so that an array like a Chinese character "tian" is formed. According to the array, an ideal magnetic boundary condition PHC is set along an X-axis direction and an ideal conductor boundary condition PEC is set along a Z-axis direction; an electromagnetic wave enters along a Y-axis direction and the excitation mode is set to be wave impedance excitation. Left-hand characteristics are formed in 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 in the shape of a matt character. 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 has embarke...

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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