Bending wave column type magnetoelastic metasurface based on magnetic field control and operation method thereof

A bending wave and metasurface technology, applied in antennas, electrical components, etc., can solve the problems of single structure and applicable function, and achieve the effect of simple metasurface structure and uncomplicated preparation.

Pending Publication Date: 2022-07-29
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the above, the present invention combines it with a column structure by introducing a magneto-rheological elastomer smart material, and designs a bending-wave column-type magnetoelastic metasurface based on magnetic field control, aiming to be able to manipulate bending waves arbitrarily without Change the main structure to solve the problem that the current metasurface is designed with a single structure and applicable function, and provide a bending wave column type magnetoelastic metasurface based on magnetic field control to promote the further development of actively controlled metasurfaces

Method used

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  • Bending wave column type magnetoelastic metasurface based on magnetic field control and operation method thereof
  • Bending wave column type magnetoelastic metasurface based on magnetic field control and operation method thereof
  • Bending wave column type magnetoelastic metasurface based on magnetic field control and operation method thereof

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Embodiment 1

[0056] Abnormal refraction: When the frequency of the incident bending wave is f=6000Hz and the wavelength is 40.4mm, a column-shaped metasurface composed of 16 unit cell structures and 15 grooves is selected, and the COMSOL Multiphysics software is used for simulation calculation. and as Figure 6a The magnetic field versus unit cell diagram shown models the metasurface and builds a perfectly matched layer around the metasurface. A Gaussian beam generating bending waves is established in the left incident region of the metasurface: F y =exp[-(y-μ) 2 / (2ζ 2 )], as shown in Figure 6b, when the incident bending wave angle is 0°, the refracted bending wave is shifted, and the theoretical refraction angle is 10° according to the generalized Snell's law formula; Figure 6c It is shown that when the incident bending wave angle is 10°, the theoretical refraction angle is 21° according to the generalized Snell's law formula; Figure 6d It is shown that when the incident bending wa...

Embodiment 2

[0058] Beam focusing: When the frequency of the incident bending wave is f=6000Hz and the wavelength is 40.4mm, a column-shaped metasurface composed of 24 unit cell structures and 23 grooves is selected, and the COMSOL Multiphysics software is used for simulation calculation. and as Figure 6a The magnetic field versus unit cell diagram shown models the metasurface and builds a perfectly matched layer around the metasurface. A Gaussian beam generating bending waves is established in the left incident region of the metasurface: F y =exp[-(y-μ) 2 / (2ζ 2 )], as shown in Figure 6b, when the incident bending wave is excited, the beam will form a focal point in the right transmission area, so the metasurface can realize the beam focusing function of the bending wave through a simple structure.

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Abstract

The invention provides a bending wave column type magnetoelastic metasurface based on magnetic field control and an operation method thereof, and relates to the technical field of artificial metamaterials, the bending wave column type magnetoelastic metasurface comprises a unit cell structure unit and an aluminum alloy substrate layer; the plurality of unit cell structure units are periodically and uniformly arranged and are adhered to the aluminum alloy substrate layer to form a metasurface structure, the aluminum alloy substrate adopts a plate-shaped structure, each unit cell structure unit comprises a columnar resonance body unit, a groove is formed between every two unit cell structure units, and the metasurface is formed by combining the intelligent material and the metasurface structure. The metasurface has the sub-wavelength magnitude in the wave beam propagation direction, parameters such as the amplitude and the phase of elastic waves can be adjusted and controlled through different magnetic field intensities, and the problem that an existing metasurface is single in structure and application function is solved.

Description

technical field [0001] The present invention relates to the technical field of novel artificial metamaterials, in particular to a bending wave column-type magnetoelastic metasurface based on magnetic field control and an operation method thereof. Background technique [0002] Metasurface is a new type of artificial material, which has the characteristics of controlling large wavelength with small volume. It is formed by the arrangement of unit cell structures in a mutant macroscopic "order" and has a subwavelength thickness in the direction of wave propagation. It can effectively control the amplitude, phase, propagation direction, etc. of waves. Metasurfaces break through the limitations of large volume, complex structure, high cost, and large loss, making it easier to prepare. , imaging, non-destructive testing, transducers, vibration isolation and noise reduction and many other fields show great application prospects. [0003] The concept of metasurface was first propose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/004
Inventor 张舜祖束世玮赵文娟边晓辉万愉快
Owner NINGXIA UNIVERSITY
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