Circularly polarized four-channel independent abnormal deflection lens based on meta-structure surface comprehensive phase regulation and control principle
A metasurface and circular polarization technology, applied in the direction of electrical components, antennas, etc., can solve the problems that the co-polarization component of the outgoing wave cannot be used, the utilization rate of transmitted energy is low, and the geometric phase control is limited.
Active Publication Date: 2020-11-03
HARBIN INST OF TECH
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[0003] The present invention is to solve the problem of the existing metasurface based on geometric phase, the geometric phase control is limited, the co-polarization component of the outgoing wave cannot be used, resulting in the low utilization rate of transmitted energy, and now provides comprehensive phase control based on metasurface Principle of circularly polarized four-channel independent anomalous deflection lens
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[0024] Specific implementation mode one: refer to Figure 1 to Figure 3 Describe this embodiment in detail. The circularly polarized four-channel independent anomalous deflection lens based on the principle of comprehensive phase control of metasurfaces described in this embodiment includes N×N superstructures based on miniaturized frequency selective surfaces arranged in a rectangular array. structural unit, N is a positive integer.
[0025] The superstructure unit based on the miniaturized frequency selective surface includes five metal layers, the five metal layers are three layers of patch layers and two layers of grid layers alternately stacked, that is, the odd-numbered layers from top to bottom are patch layers. The sheet layer and the even-numbered layer are grid layers. A dielectric layer is arranged between two adjacent metal layers. Both the grid layer and the medium layer are square and have equal side lengths, and the patch layer is rectangular and its long side...
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The invention discloses a circularly polarized four-channel independent abnormal deflection lens based on a meta-structure surface comprehensive phase regulation and control principle, and relates tothe technical field of electromagnetic wave regulation and control. The invention aims to solve the problem of the existing geometric phase-based meta-structure surface that the geometric phase regulation and control are limited, and the co-polarization components of emergent waves cannot be utilized, so that the utilization rate of transmission energy is low. The circularly polarized four-channelindependent abnormal deflection lens comprises N*N superstructure units which are arranged in a rectangular array and are based on a miniaturized frequency selective surface, the superstructure unitbased on the miniaturized frequency selective surface comprises five metal layers, the five metal layers are three patch layers and two grid layers which are alternately arranged in a stacked mode, adielectric layer is arranged between every two adjacent metal layers, three rectangular gaps parallel to one another are formed in each patch layer, and a circular through hole is formed in the centerof each grid layer.
Description
technical field [0001] The invention belongs to the technical field of electromagnetic wave regulation, in particular to an electromagnetic wave regulation element. Background technique [0002] The basic principle of wavefront deflection manipulation of electromagnetic waves based on metasurfaces is the generalized law of refraction, that is, introducing a layer of phase discontinuous metaunits in the direction of electromagnetic wave propagation, and regularly providing the required phase mutation at specific positions. The most commonly used method for controlling the wavefront of circularly polarized electromagnetic waves is the principle of geometric phase control, which introduces a phase mutation amount twice the rotation angle by rotating the unit structure. There is a defect in the metasurface based on the geometric phase, that is, for the orthogonal circularly polarized incident wave, the cross-polarization phase response of the outgoing wave is in a conjugate stat...
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IPC IPC(8): H01Q15/00
CPCH01Q15/0086H01Q15/0026
Inventor 张狂袁乐眙巴璐吴群
Owner HARBIN INST OF TECH