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Honeycomb meta-material surface capable of generating orbital angular momentum waves

An orbital angular momentum and metamaterial technology, which is applied in the field of communication to achieve the effects of simple structure, convenient processing and low cost

Active Publication Date: 2018-12-07
FUDAN UNIV
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Problems solved by technology

The specific method is to change the dielectric constant of different positions by punching holes in the dielectric plate so that it has different phase delays, and to change the phase with a multi-layer phase-shifting planar plate, but these technologies can only convert linearly polarized plane waves to convert, there are limitations

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  • Honeycomb meta-material surface capable of generating orbital angular momentum waves
  • Honeycomb meta-material surface capable of generating orbital angular momentum waves
  • Honeycomb meta-material surface capable of generating orbital angular momentum waves

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and examples; this example provides detailed implementation and specific operation process, but the protection scope of the present invention is not limited to the following examples.

[0022] Such as Figure 1-3 As shown, the present invention provides a metamaterial surface capable of converting arbitrary polarization incident plane waves into orbital angular momentum waves, with a center frequency of 10 GHz and an overall size of 36×41×0.6 cm 3 (length×width×height), this embodiment includes: a +1 mode metamaterial surface composed of six different metamaterial units and a +2 mode metamaterial surface composed of three different metamaterial units.

[0023] Such as figure 2 , 3 As shown, the metamaterial unit described in this embodiment is composed of 4 dielectric substrates, a total of four layers of hexagonal metal patches carved on the upper and lower surfaces o...

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Abstract

The invention belongs to the technical field of communication, and particularly relates to a honeycomb meta-material surface capable of generating orbital angular momentum waves. The honeycomb meta-material surface is formed by arranging six kinds of meta-material elements. Each kind of elements is arranged and distributed in six regions in the plane. Each region has 120 meta-material elements. All the regions have the same diamond shape. The centers of the meta-material elements in the six regions are arranged in the same way, and form a hexagonal shape. Each meta-material element is composedof four dielectric substrates, four metal patches and a metal slit layer which are stacked alternately, wherein the four dielectric substrates are stacked from top to bottom, the four metal patches are regular hexagons of the same size and are distributed on the upper and lower surfaces and in the inter-layers of the dielectric substrates, and each metal patch is aligned with the center of the slit. The meta-material surface of the invention can convert plane waves entering in any polarization mode into orbital angular momentum waves, and orbital angular momentum wave of different modes can be formed by changing the arrangement mode of the meta-material elements. The honeycomb meta-material surface has the advantages of flexible design, simple structure, low cost, and the like.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a metamaterial surface capable of generating orbital angular momentum waves. Background technique [0002] With the rapid development of modern wireless communication systems and people's requirements for faster information transmission speeds, Orbital angular momentum (OAM) can effectively improve spectrum utilization and channel capacity due to its mutually orthogonal characteristics of modulus. It has attracted much attention for providing an ideal reuse dimension. [0003] There are many ways to generate OAM waves, such as using aperture-coupled circularly polarized array antennas to generate circularly polarized OAM waves, and using multiplexed Cassegrain reflective antennas to generate OAM waves, but the above two methods are both A complex feed network needs to be designed. A simpler method is to use a spiral phase plate (SPP) to generate OAM waves. The...

Claims

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Application Information

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IPC IPC(8): H01Q15/00
CPCH01Q15/0086
Inventor 徐煜思杨国敏金亚秋
Owner FUDAN UNIV
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