Slotted I-shaped left-hand material
A left-handed material, I-shaped technology, applied in the field of metamaterials, can solve the problems of narrow bandwidth, large loss, large volume, etc., and achieve the effect of excellent performance
Inactive Publication Date: 2018-07-06
TIANJIN UNIV
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Problems solved by technology
However, these structures generally have a series of problems such as complex structure, narrow bandwidth, large loss, and large volume, which seriously limit the application and development of left-handed materials.
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[0018] The present invention will be further described below in conjunction with the accompanying drawings.
[0019] The invention protects an I-shaped left-handed material with slits, including a unit structure composed of a dielectric substrate. In this embodiment, the dielectric substrate is made of a commonly used dielectric FR4 material, with a relative permittivity of 4.4 and a loss tangent of 0.02, substrate height h=3.36mm, width a=1.40mm, thickness 0.50mm, structural dimensions such as figure 1 As shown, one side of the dielectric substrate is plated with I-shaped copper plating; the vertical copper plating in the I-shaped structure is provided with rectangular slits, the width of the copper plating is 0.12mm, and the thickness is 0.035mm. And the specific size of the vertical copper plating length of the I-shaped structure after optimized design by HFSS software is l=2.60mm, wherein the length of the rectangular slit is t=1.50mm, and the width s=0.05mm.
[0020] In ...
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Abstract
The invention discloses a slotted I-shaped left-hand material comprising a unit structure formed by a dielectric substrate. 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 height of the dielectric substrate is 3 to 3.6 mm, the width of the dielectric substrate is 1.4 mm, and the thickness of the dielectric substrate is 0.5 mm. One side of the dielectric substrate is plated with an I-shaped-structure-based plated cooper part; and a rectangular slot is formed in the vertical plated copper part in the I-shaped structure. The unit structure expands and extends respectively in a three-dimensional direction to realize mutual connection, so that an I-shaped structural array is formed. According to I-shaped structural 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-handed characteristics are formed in the Y direction. The left-hand material has characteristics ofwide frequency band, low loss, small unit, simple structure and great easiness in manufacturing.
Description
technical field [0001] The invention relates to the field of metamaterials, in particular to an I-shaped left-handed material with slits. 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 embarked on a fast track of rapid d...
Claims
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IPC IPC(8): H01Q15/00
CPCH01Q15/0086
Inventor 金杰何政蕊张赟
Owner TIANJIN UNIV