Transmission type polarized transition super surface

A polarization conversion and metasurface technology, applied in electrical components, antennas and other directions, can solve the problems of narrow bandwidth, complex structure and large volume of circularly polarized devices, and achieve the effect of small structure size, wide application prospect and low cost.

Active Publication Date: 2018-01-09
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, whic

Method used

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  • Transmission type polarized transition super surface
  • Transmission type polarized transition super surface
  • Transmission type polarized transition super surface

Examples

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Example Embodiment

[0025] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments: this embodiment is implemented on the premise of the technical solution of the present invention, and provides detailed implementation and specific operating procedures, but the scope of protection of the present invention is not limited to the following Mentioned examples.

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

[0027] Such as figure 2 As shown, the top metal patch 1 of the super-surface unit described in this embodiment is etched with a cross-shaped gap. The cross-shaped gap has the s...

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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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IPC IPC(8): H01Q15/24
Inventor 张福恒杨国敏金亚秋
Owner FUDAN UNIV
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