Metastructure surface integrated with three-dimensional convex top layer structure

A metasurface and metasurface technology, applied in electrical components, antennas, etc., can solve the problems of difficult control of terahertz waves and harsh electromagnetic wave conditions, and achieve good isotropy, excellent insensitivity to angles, and simple structure Effect

Active Publication Date: 2021-07-30
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a metasurface with an integrated three-dimensional convex top layer structure, a metasurface with an integrated three-dimensional convex top layer structure with excellent beam isotropy control characteristics at terahertz, using the metasurface for electromagnetic waves Excellent control ability, on the basis of the two-dimensional structure, design a hemispherical metal three-dimensional convex unit structure, and form a metasurface array structure, and verify that it has good isotropy, which can effectively solve the problems existing in the above background technology The key components of terahertz communication have strict requirements on electromagnetic wave conditions, the difficulty of terahertz wave regulation and other technical problems that cannot meet the development needs of modern communication technology

Method used

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  • Metastructure surface integrated with three-dimensional convex top layer structure
  • Metastructure surface integrated with three-dimensional convex top layer structure
  • Metastructure surface integrated with three-dimensional convex top layer structure

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Embodiment 1

[0050] Such as figure 2 As shown, Embodiment 1 of the present invention provides a 1-bit coded metasurface whose top pattern is a solid metal hemisphere. top floor 3.

[0051] In the specific embodiment 1 of the present invention, the metasurface unit is a subwavelength array unit structure. The sub-wavelength unit structure refers to the unit structure whose structural size is at the wavelength (micron level), and has peculiar electromagnetic resonance properties, such as negative refraction, abnormal transmission, breaking through the diffraction limit, and sensitivity to dielectric environments. The resonance characteristics can be enhanced through the design of the subwavelength metal unit structure.

[0052] In the specific embodiment 1 of the present invention, the dielectric material layer 2 is made of polyimide film, and polyimide is a flexible material. As a dielectric material, the metasurface array can make the metasurface easy to bend and conform, and improve it...

Embodiment 2

[0059] A top-layer pattern provided by Embodiment 2 of the present invention is a 1-bit coded metasurface of a hollow metal hemisphere. The metasurface unit includes a metal back electrode 1, a two-dimensional dielectric material layer 2, and a three-dimensional hollow hemispherical top layer 3 arranged in sequence. Such as Figure 9 shown.

[0060] In the specific embodiment 2 of the present invention, the metasurface unit is a subwavelength array unit structure. The sub-wavelength unit structure refers to the unit structure whose structure size is much smaller than the wavelength, and has peculiar electromagnetic resonance properties, such as negative refraction, abnormal transmission, breaking through the diffraction limit, and sensitivity to dielectric environments. Resonant properties can be enhanced by subwavelength metallic structures.

[0061] In the specific embodiment 2 of the present invention, the two-dimensional dielectric material layer is made of polyimide fil...

Embodiment 3

[0068] Such as figure 2 As shown, a top-layer pattern provided by Embodiment 3 of the present invention is a 2-bit coded metasurface of a solid metal hemisphere, and the metasurface unit includes a metal back electrode 1, a two-dimensional dielectric material layer 2, and a three-dimensional solid hemisphere structure arranged in sequence top floor 3.

[0069] In the specific embodiment 3 of the present invention, the two-dimensional dielectric material layer is made of polyimide film, polyimide is a flexible material, and the metasurface array made of the dielectric material can make the metasurface bendable.

[0070] Such as figure 2 As shown, in the specific embodiment 3 of the present invention, the top layer of the three-dimensional solid hemisphere adopts metallic copper. The radii R1 of the four phase encoding unit hemispheres are 10 μm, 31.8 μm, 37.3 μm and 40 μm respectively, and the actual unit hemisphere radii may not be accurate to one or two decimal places. S...

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Abstract

The invention discloses a metasurface integrated with a three-dimensional protruding top layer structure, and belongs to the technical field of terahertz wave band metamaterials and metasurfaces. The metasurface structure unit of the metal hemisphere comprises a metal back electrode, a dielectric layer and a three-dimensional metal hemisphere structure layer which are arranged in sequence, and the dielectric layer is composed of a plurality of metal hemispheres by using a flexible material hemisphere unit structure. The three-dimensional metal hemisphere structure has good isotropy and has the characteristic that the three-dimensional metal hemisphere structure is insensitive to an incident plane wave angle in a terahertz wave band. And further in combination with the idea of communication modulation coding, a coding matrix is realized by combining and designing metamaterial unit arrays with different sizes, the RCS is effectively reduced, and effective regulation and control of the terahertz wave beam are realized. In the vicinity of 0.96 THz and 1.5 THz, two metal hemispherical top-layer metasurface surfaces can have good insensitive characteristics to an incident angle within an electromagnetic wave incident angle of 60 degrees, and terahertz waves can be effectively regulated and controlled.

Description

technical field [0001] The invention relates to a metasurface integrating a three-dimensional raised top layer structure, and belongs to the technical field of terahertz band metamaterials and metasurfaces. Background technique [0002] Metamaterials are subwavelength artificial electromagnetic materials that can be described by equivalent dielectric parameters such as permittivity and permeability. Metamaterials have many special properties, such as negative refractive index, perfect imaging, invisibility cloak, etc., which can realize electromagnetic wave modulation. Its corresponding two-dimensional planar structure is called a metasurface. Because the metasurface is relatively simple to manufacture, the structure is generally not too complicated, and its good ability to regulate electromagnetic waves has recently attracted a lot of research. In the terahertz band, the metasurface has become In addition to regulating electromagnetic waves is a very important device, it h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/14
CPCH01Q15/14
Inventor 陈国斌李修函王宝龙许巍杨甲一刘斯达
Owner BEIJING JIAOTONG UNIV
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