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Substrate-based miniaturized artificial electromagnetic material and preparation method thereof

A technology of artificial electromagnetic materials and substrates, which can be used in electrical components, antennas, etc., and can solve the problems of large size and inability to put into practical applications.

Active Publication Date: 2015-06-03
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working frequency of these applications mentioned above is from 3MHz to 1000MHz. The unit structure size of the artificial electromagnetic materials proposed by people is generally λ / 10, where λ refers to its working wavelength. 0.3m, if the artificial electromagnetic material unit is designed according to the conventional method, the unit structure size is about 10m to 0.03m, which is too large to be put into practical application, so the HF, VHF and UHF frequency bands are designed and the size is below λ / 100. Wavelength miniaturized artificial electromagnetic materials have great application prospects

Method used

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  • Substrate-based miniaturized artificial electromagnetic material and preparation method thereof
  • Substrate-based miniaturized artificial electromagnetic material and preparation method thereof
  • Substrate-based miniaturized artificial electromagnetic material and preparation method thereof

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Embodiment 1

[0043] refer to figure 1 , the miniaturized artificial electromagnetic material based on a layer of substrate in the present invention is composed of N structural units arranged in parallel and equidistantly bonded, N≥2, and the structure of each structural unit is as follows figure 1 shown.

[0044] refer to figure 1 , the structural unit of the present invention comprises a dielectric substrate layer 1, the two sides of the dielectric substrate layer are equally etched rectangular broken lines; The bottom end of the rectangular fold line is connected, and the metal layer 2 coated on the other end of the dielectric substrate is connected to the top of the rectangular fold line on the other side of the dielectric substrate layer 1; N units, N≥2, are parallelized with the length of the overall substrate of the unit as a period Equidistantly arranged and bonded to obtain artificial electromagnetic material blocks.

[0045] refer to figure 2 , the invention makes figure 1 A...

Embodiment 2

[0051] The miniaturized artificial electromagnetic material based on a layer of substrate in the present invention is composed of N structural units arranged in parallel and equidistantly bonded, N≥2, and the structure of each structural unit is as follows image 3 shown.

[0052] refer to image 3 , the structural unit of the present invention includes a dielectric substrate layer 1, one side of the dielectric substrate layer 1 is etched with a rectangular folded line, the other side is etched with a plane spiral, and the center of the spiral is connected with a circular metal patch 3; both ends of the dielectric substrate are coated with a metal layer 2. The metal layer 2 coated on one end of the dielectric substrate is connected to the bottom end of the rectangular fold line on the dielectric substrate layer 1, and the metal layer 2 coated on the other end of the dielectric substrate is connected to the top end of the rectangular fold line on the dielectric substrate layer ...

Embodiment 3

[0055] In the first step, the thickness is selected to be 0.2mm, and the dielectric constant ε r =2.6±0.05, loss tangent tanδ=0.015 PTFE double-sided PCB copper-clad laminate, etched on the surface of one copper-clad foil as Figure 5 Rectangular fold line shown, etch on another copper clad surface as Image 6 As shown in the planar spiral line, a dielectric substrate layer with one side as a folded line surface and the other side as a helical surface is obtained; Figure 5 The length L of the middle rectangle polyline m =0.99L, width H m =0.99H, horizontal line width L of rectangular polyline wm =1.15×10 -2 L, the vertical line width L of the rectangular polyline wm =7.7×10 -3 L, line spacing S wm =7.7×10 -3 L; Image 6 The outer contour length L of the mid-plane helix p =0.92L, outer contour width H p =0.92H, number of turns n=13, line width L wp =8.1×10 -3 L, line spacing is S wp =1.23×10 -2 L, the radius of the circular metal patch connected to the center of...

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Abstract

The invention discloses a substrate-based miniaturized artificial electromagnetic material and a preparation method thereof, mainly solving the problems of overlarge dimension, overhigh frequency and unable practical application of structural units of the traditional artificial electromagnetic materials in HF (High Frequency), VHF (Very High Frequency) and UHF (Ultra High Frequency) frequency ranges. A realization method comprises the following steps of: firstly etching rectangular fold lines on a double-surface PCB (Printed Circuit Board) copper-clad plate or etching the rectangular fold line on one surface and a plane spiral line on the other surface, coating metal layers on both ends of the substrate, and respectively connecting the fold lines positioned on the substrate with the metal layers coated on the both ends to obtain a structural unit; and then parallelly arraying and adhering same structural units at equal distances by taking the length of the integral substrate of the structural unit as a period to obtain an artificial electromagnetic material bulk. The invention can be used for realizing near-zero refraction characteristics or negative refraction index characteristics in the HF, VHF and UHF frequency ranges, has the advantages of long subwavelength, simple structure, miniaturization and low frequency and can be used for improving the performance of various communication electron systems in the HF, VHF and UHF frequency ranges.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic materials, and relates to an electromagnetic material and a preparation method thereof, in particular to a highly sub-wavelength miniaturized artificial electromagnetic material in the frequency bands of high frequency HF, very high frequency VHF and ultra high frequency UHF, and a preparation method thereof. It can be used to construct miniaturized artificial electromagnetic materials with negative equivalent dielectric constant, negative refractive index and near-zero refractive index characteristics in HF, VHF and UHF frequency bands, and improve the performance of communication systems or equipment in HF, VHF and UHF frequency bands. Background technique [0002] Artificial electromagnetic materials (Metamaterials) refer to artificial media or materials with unconventional electromagnetic properties that do not exist or are not found in nature, but are constructed by people based on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
Inventor 李龙范迎春余世星周凯刘海霞翟会清史琰
Owner XIDIAN UNIV