Structural design of reflective polarization conversion orbital angular momentum convergence metasurface

An orbital angular momentum and polarization conversion technology, which is applied to electrical components, antennas, etc., can solve the problems of effective transmission and reception of unfavorable information, lack of reflective metasurfaces, etc., and achieves the effects of simple structure, low cost, and simple manufacturing process.

Active Publication Date: 2020-08-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, the current research on the use of metasurfaces to explore the properties of OAM is mainly focused on the design of transmissive structures, and there is a lack of research on the generation and convergence of reflective metasurfaces. In the process of OAM transmission, the beam divergence phenomenon is more obvious. , this situation is not conducive to the effective transmission and reception of information, so it is particularly important to study the convergence of OAM and reduce the beam radius of OAM during transmission

Method used

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  • Structural design of reflective polarization conversion orbital angular momentum convergence metasurface
  • Structural design of reflective polarization conversion orbital angular momentum convergence metasurface
  • Structural design of reflective polarization conversion orbital angular momentum convergence metasurface

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Embodiment 1

[0030] In this embodiment: n=8, the length and width of the bottom metal layer and the middle dielectric layer are both 10 mm, and the thickness of the middle dielectric layer is 3 mm; both the bottom metal layer and the top metal pattern layer have an electrical conductivity of 5.8×10 7 S / m metal copper; the intermediate dielectric layer is made of Teflon with a dielectric constant of 2.65 and a loss of 0.0002.

[0031] Specific steps are as follows:

[0032] Step 1: Design an initial basic unit structure with polarization characteristics according to the basic principle of polarization conversion, as shown in Figure 1. In CST, the polarization unit structure is modeled, simulated and optimized. The basic unit structure includes a bottom metal layer 1, a middle dielectric layer 2, and a top metal pattern layer 3, wherein the bottom metal layer 1 and the middle dielectric layer 2 have the same periodic size, and the center of the pattern layer 3 is symmetrically opened to for...

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Abstract

The invention belongs to the technical field of electronic material communication and particularly relates to a structural design of a reflective polarization conversion orbital angular momentum convergence metasurface. The method comprises the following steps of firstly, selecting n/2 basic unit structures according to amplitude and phase conditions required for generating and converging OAM (Operation Administration and Maintenance) so that phase difference of 180 degrees can be realized; secondly, turning over along the polarization axis of an incident electric field to obtain another n/2 basic units capable of realizing-180-degree phase difference; thirdly, in MATLAB, according to the relation among the input phase, the output phase, a convergence factor and the compensation phase, compensation phase distribution of the metasurface is obtained through program design calculation; and finally, performing macro modeling in the CST according to compensation phase data obtained by MATLAB calculation, thereby obtaining a metasurface structure capable of converging OAM.

Description

technical field [0001] The invention belongs to the technical field of electronic material communication, in particular to a structural design of a reflective polarization conversion orbital angular momentum converging metasurface. Background technique [0002] In the future, the intelligent world will have more and more requirements for mobile Internet. The development of wireless communication technology has approached the limit of channel capacity, and the utilization rate of spectrum needs to be developed from other dimensions. The new wireless transmission technology of electromagnetic wave angular momentum characteristics may bring about the era change of wireless communication. A light beam with vortex phase and carrying orbital angular momentum is called orbital angular momentum (OAM, Orbital Angular Momentum). The orbital angular momentum mode of an ordinary electromagnetic wave is 0, and its wavefront is a uniform plane wave. If the OAM mode of the electromagneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0033H01Q15/0046
Inventor 陈海燕黎凤霞沈鑫李冠亚何清婷韩天成邓龙江谢建良张丽李小秋周志鹏
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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