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Metasurface capable of controlling wave absorbing and polarization conversion functions and based on electric field triggering

A polarization conversion and metasurface technology, applied in the fields of microwave, wireless communication and radar, it can solve the problems of not realizing structure sharing, unable to realize wave absorption function, unable to realize polarization conversion function, etc., to achieve structure sharing and easy integration. the effect of

Active Publication Date: 2019-04-26
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

For example: the authorized announcement number is CN 104638382 B, and the patent titled "a dual-frequency metamaterial absorber" discloses a dual-frequency metamaterial absorber, using the metal square ring on the top layer and the metal square ring inside The two structures of the metal ring produce two different electromagnetic resonance absorption frequency points, but this structure can only realize the function of absorbing waves, and cannot realize the function of polarization conversion
For example, the authorized announcement number is CN 104577352 B, and the patent titled "A Microwave Band Active Frequency Selective Surface Tunable Polarization Converter" discloses a microwave band active frequency selective surface tunable polarization converter. By controlling the on-off state of the PIN diode on the frequency selection surface, the output of circularly polarized or linearly polarized electromagnetic waves can be realized, but it can only realize the function of polarization conversion and cannot realize the function of absorbing waves.
[0003] With the development of wireless communication systems, the requirements for the integration of system functions are getting higher and higher, but the existing absorbers and polarization converters usually only realize their own functions, and do not share the structure, so they can realize two Functional metasurfaces are of great significance to the integration of wireless communication systems such as radar detection

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  • Metasurface capable of controlling wave absorbing and polarization conversion functions and based on electric field triggering
  • Metasurface capable of controlling wave absorbing and polarization conversion functions and based on electric field triggering
  • Metasurface capable of controlling wave absorbing and polarization conversion functions and based on electric field triggering

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] refer to figure 1 , the present invention includes 10×10 periodically arranged metasurface units, the arrangement period of the metasurface units in the x and y directions is 10 mm, which is composed of a dielectric substrate 1, a metal floor 2 and a metal patch unit 3 ; Relative permittivity ε of dielectric substrate 1 r =4.4, the thickness is 2mm, the loss tangent value δ=0.02, the metal floor 2 is printed on one side, and the metal patch unit 3 is printed on the other side.

[0018] refer to figure 2 , the metal patch unit 3 is composed of two U-shaped metal patches 31 whose opening directions differ by 180°, are mirror-symmetrical, and have opposite openings, and a metal microstrip line 32 connecting the two U-shaped metal patches 31 in series. Absorbing resonance frequency satisfies c is the propagation speed of elec...

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Abstract

A metasurface capable of controlling wave absorbing and polarization conversion functions and based on electric field triggering comprises m*n periodically arranged metasurface units. Each metasurfaceunit comprises a dielectric substrate, a metal patch unit printed on one side of the dielectric substrate and a metal floor on the other side. Each metal patch unit is composed of two U-shaped metalpatches 180-degree apart from each other and mirror-symmetrical and a metal microstrip line connecting the two U-shaped metal patches in series. When the electric field direction of incident electromagnetic wave rotates gradually from the y axis, that is, the opening direction of the U-shaped metal patches to the x axis, the triggering wave absorbing rate is gradually decreased, and the electromagnetic wave linear polarization-circular polarization-linear polarization characteristics are achieved by triggering at the same time. The polarization conversion ratio is the best when the electric field direction of the incident electromagnetic wave is located on the bisecting of the x axis and the y axis. The metasurface can achieve the wave absorbing and polarization conversion functions by triggering by changing the electromagnetic wave electric field direction, and can be used in a microwave communication system.

Description

technical field [0001] The invention belongs to the field of microwave technology, and relates to an electric-field-triggered metasurface with controllable wave-absorbing and polarization conversion functions, which can be used in the fields of wireless communication and radar. Background technique [0002] As a new type of artificial electromagnetic material, metasurface can effectively manipulate electromagnetic waves according to needs. In order to meet the requirements of wireless communication systems, the realization of functions such as wave absorption and polarization conversion through metasurfaces has become a research hotspot. For example: the authorized announcement number is CN 104638382 B, and the patent titled "a dual-frequency metamaterial absorber" discloses a dual-frequency metamaterial absorber, using the metal square ring on the top layer and the metal square ring inside The two metal ring structures produce two different electromagnetic resonance absorb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q15/24H01Q17/00
CPCH01Q15/0086H01Q15/242H01Q15/244H01Q17/008
Inventor 杨锐阚尧
Owner XIDIAN UNIV