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Full-space regulation electromagnetic metasurface capable of generating orbital angular momentum

An orbital angular momentum, electromagnetic super technology, applied in electrical components, antennas and other directions, can solve problems such as the inability to achieve full-space control, and achieve the effect of solving the vortex wave diffraction divergence phenomenon and the overall beam collimation effect.

Active Publication Date: 2021-11-26
XIDIAN UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

The disadvantage of these electromagnetic metasurfaces is that they can only generate Bessel beams carrying orbital angular momentum in one direction to realize the control of electromagnetic waves, but cannot achieve full-space control

Method used

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  • Full-space regulation electromagnetic metasurface capable of generating orbital angular momentum
  • Full-space regulation electromagnetic metasurface capable of generating orbital angular momentum
  • Full-space regulation electromagnetic metasurface capable of generating orbital angular momentum

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Embodiment

[0030] The present invention mainly consists of an electromagnetic metasurface operating at 10 GHz and a feed source. The electromagnetic metasurface includes several circularly polarized units, wherein:

[0031] The circular polarization unit is composed of upper and lower layers of the same metal pattern layer and a dielectric substrate in the middle, and the period of the unit is p=12mm. The metal pattern layer includes a circular metal patch and a rectangular metal patch integrated with the circular metal patch. The inner diameter of the circular metal patch is r1=4.2mm, the outer diameter r2=4.4mm, the width of the rectangular metal patch is w=0.2mm, the length of the two rectangular metal patches in the middle is d=6.65mm, and the spacing s=0.1mm . The relative permittivity of the dielectric substrate is 2.2, and the height h=2.9mm. At the working frequency, when the unit is irradiated with a right-handed circularly polarized wave, the left-handed circularly polarized ...

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Abstract

The invention discloses a full-space regulation electromagnetic metasurface capable of generating orbital angular momentum. The full-space regulation electromagnetic metasurface comprises a plurality of circular polarization units and a feed source; the plurality of circular polarization units are uniformly arranged to form an electromagnetic metasurface, and the feed source is arranged right above the electromagnetic metasurface. The electromagnetic metasurface can simultaneously generate different circularly polarized OAM vortex waves in the transmission direction and the reflection direction, can generate right-hand circularly polarized vortex waves with the mode number of-1 in the reflection direction, can generate left-hand circularly polarized vortex waves with the mode number of 1 in the transmission direction, and polarization conversion is made in the transmission direction, so that full-space regulation and control are realized. And when the vortex wave is propagated along with the distance, the overall collimation effect of the wave beam is good, and the diffraction divergence phenomenon of the vortex wave is solved.

Description

technical field [0001] The invention relates to the technical field of orbital angular momentum electromagnetic wave regulation, in particular to an electromagnetic metasurface capable of producing full-space regulation with orbital angular momentum. Background technique [0002] With the rapid development of communication technology, limited spectrum resources can no longer meet the increasing data capacity. Therefore, under the current shortage of spectrum resources, improving spectrum utilization is one of the driving forces for the development of information technology. A beam with a non-planar equiphase surface, that is, an electromagnetic wave carrying orbital angular momentum, has begun to enter the field of vision of researchers. They are called "vortex waves" because they propagate helically along the beam axis. Orbital angular momentum waves have a new degree of freedom because they carry orbital angular momentum. Theoretically, there are infinitely many orthogon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q15/24
CPCH01Q15/0086H01Q15/242H01Q15/0013
Inventor 朱诚李冰琪谭玉龙岳琴棉胡靓亮梁航
Owner XIDIAN UNIV
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