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A transmissive polarization conversion metasurface

A polarization conversion and metasurface technology, applied in antennas, electrical components, etc., can solve the problems of narrow bandwidth, complex structure, and many layers of circularly polarized devices, and achieve small structure size, wide application prospects, and low cost. Effect

Active Publication Date: 2020-04-17
FUDAN UNIV
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Problems solved by technology

[0004] Most of the traditional transmissive polarization converters use different dielectric thicknesses to generate specific phase difference requirements at specific frequencies, which has the disadvantage of being too large. Other circularly polarized devices designed using metasurfaces have narrow bandwidth, complex structures, and layers. Too many and not enough

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  • A transmissive polarization conversion metasurface
  • A transmissive polarization conversion metasurface
  • A transmissive polarization conversion metasurface

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and embodiment, the present invention will be further described: present embodiment is carried out under the premise of technical scheme of the present invention, has provided detailed implementation mode and concrete operation process, but protection scope of the present invention is not limited to the following the described embodiment.

[0026] Such as Figure 1-3 As shown, the present invention provides a novel transmission-type polarization conversion metasurface, the working frequency band is the X-band, and the overall size is 220×220×3mm 3 (Length × Width × Height), this embodiment includes: including the top layer metal patch 1, the middle layer metal patch 2, the bottom layer metal patch 3, the upper layer dielectric substrate 4 that plays a supporting role, and the lower layer dielectric substrate 5 that plays a supporting role .

[0027] Such as figure 2 As shown, the metal patch 1 on the top layer of the me...

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Abstract

The invention provides a transmission type polarized transition super surface, which belongs to the technical field of microwave frequency range electromagnetic wave regulation and control. The polarized super surface unit comprises three layers of metal pasters, with a medium substrate being disposed between two layers of metal pasters, and the top layer of metal paster and bottom layer of metalpaster having the same structure. Through reasonably designing the structure size of the top layer, the middle layer and the bottom layer of metal pasters, the incident linear polarization electromagnetic wave passes through the super surface structure and then continues to transmit. The transmitting electromagnetic wave has the equal electric field amplitude in the horizontal direction and the vertical direction, and the phase difference is 90 degree between the horizontal direction and the vertical direction, and thereby the transmitting electromagnetic wave has the feature of circular polarization. The invention is advantageous in that the transmission type circular polarization super surface has wide broadband, ultrathin surface, simple structure, and low cost; the polarized state of the electromagnetic wave can be flexibly controlled; wide application prospect is provided in fields like antennas, imaging, communication systems, electromagnetic confrontation and military stealth.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave control in the microwave frequency band, and in particular relates to a novel transmission-type polarization conversion metasurface. Background technique [0002] Polarization is an important feature to characterize electromagnetic waves. It is distinguished according to the trajectory of the electric field vector in the process of electromagnetic wave propagation. When the electromagnetic wave propagates forward along the wave vector k direction, as time changes, if the trajectory of the end of the electric field vector is a straight line or a circle and ellipse, the corresponding polarization states of electromagnetic waves are linear polarization, circular polarization and elliptical polarization respectively. Generally speaking, electromagnetic waves of one polarization can only be received by electronic equipment that radiates the same polarization (such as horizontal linear pola...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/24
Inventor 张福恒杨国敏金亚秋
Owner FUDAN UNIV
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