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Polarization rotation metasurface based on dielectric material and production method of polarization rotation metasurface

A dielectric material and polarization rotation technology, applied in electrical components, antennas, etc., can solve problems such as oxidation resistance, corrosion resistance, high temperature resistance and high power limitations

Inactive Publication Date: 2017-01-04
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, typical metasurfaces are designed based on metal structures. Although metal structures have many advantages, they have certain limitations in terms of oxidation resistance, corrosion resistance, high temperature resistance, and high power.

Method used

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  • Polarization rotation metasurface based on dielectric material and production method of polarization rotation metasurface
  • Polarization rotation metasurface based on dielectric material and production method of polarization rotation metasurface
  • Polarization rotation metasurface based on dielectric material and production method of polarization rotation metasurface

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Embodiment 1

[0034] In this embodiment, a circular dielectric substrate with a notched asymmetric dielectric structure is used, and the dielectric substrate is made of a dielectric material. Specifically, the dielectric material used is microwave ceramics. The raw materials used in ceramic preparation include anhydrous barium carbonate, magnesium oxide, anhydrous strontium carbonate, titanium dioxide, lanthanum oxide, and its stoichiometric ratio is 0.7Ba 0.6 Sr 0.4 TiO 3 --0.3La(Mg 0.5 Ti 0.5 )O 3 . Microwave ceramics are prepared as a circular notched asymmetric structure, and then periodically arranged on a metal substrate to form a polarization rotation metasurface. The structure has dielectric resonance characteristics in a specific microwave frequency band, so that the polarization of electromagnetic waves changes. At each resonant frequency, the rotating surface behaves as a high-impedance surface along one axis, and as a metal reflective surface on the other orthogonal axis, ...

Embodiment 2

[0048] Changed ceramic formula to 0.6Ba 0.6 Sr 0.4 TiO 3 -0.4La(Mg 0.5 Ti 0.5 )O 3 , changing the sintering temperature and other conditions, the dielectric constant of the prepared ceramic is 85, and the loss is about 0.002. At this time, the circular notch structure is still used. Change its parameters to a=b=8.8mm, R=2.5mm, d=7mm. Continue to use CST Microwave Studio software for simulation, and the obtained S parameters are as follows Image 6 shown. It can be seen that there is a good polarization rotation effect at 5.09-6.2GHz and 6.84-6.9GHz.

Embodiment 3

[0050] Changed the ceramic recipe to SrTiO 3 , changing the sintering temperature and other conditions, the dielectric constant of the prepared ceramic is about 300. At this time, the circular notch structure is still used. Change its parameters to a=b=5mm, R=2mm, d=6mm. Continue to use CSTMicrowave Studio software for simulation, and the obtained S parameters are as follows Figure 7 shown. It can be seen that there is a good polarization rotation effect at 3.07-3.93GHz and 4.42-4.45GHz.

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Abstract

The invention discloses a polarization rotation metasurface based on a dielectric material. The polarization rotation metasurface comprises a metal substrate at a lower layer and at least one medium substrate positioned at a surface layer, wherein the medium substrates are uniformly arranged into a plane array to be arranged above the metal substrate, the medium substrate is of a circular structure with a notch, the notch on the medium substrate is a quarter circular notch, and the medium substrate is adhered onto the metal substrate. In order to overcome the limitation of the metasurface based on the metal structure, a dielectric material is adopted, and the characteristics of the dielectric material can be sufficiently played to overcome the weaknesses of the metal structure; and the polarization rotation metasurface based on the dielectric material can produce a polarization conversion characteristic for incident electromagnetic waves.

Description

technical field [0001] The invention belongs to the technical field of metasurface design, and more specifically relates to a polarization rotation metasurface based on a dielectric material and a manufacturing method thereof. Background technique [0002] Metasurface (Metasurface) is a periodic surface that can regulate electromagnetic waves. It can change the transmission characteristics of electromagnetic waves by adjusting parameters such as the amplitude and phase of electromagnetic waves. Metasurfaces can realize functions such as anomalous reflection, anomalous transmission, polarization rotation, and flat plate focusing of electromagnetic waves. Generally speaking, typical metasurfaces are designed based on metal structures. Although metal structures have many advantages, they have certain limitations in terms of oxidation resistance, corrosion resistance, high temperature resistance, and high power. Contents of the invention [0003] The purpose of the present in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0086
Inventor 屈绍波李立扬王军王甲富马华冯明德张介秋
Owner AIR FORCE UNIV PLA