Metasurface Spin and Wavefront Controller and Design Method Based on Interference Principle

A controller and metasurface technology, applied to antennas, electrical components, etc., can solve problems such as single function and complex design

Active Publication Date: 2020-06-02
AIR FORCE UNIV PLA
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Problems solved by technology

At the same time, in order to obtain stacked chirality in the vertical direction, the previous method used a multi-layer structure, the design is extremely complicated and the realized function is relatively simple, just different modes of the same function.

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  • Metasurface Spin and Wavefront Controller and Design Method Based on Interference Principle
  • Metasurface Spin and Wavefront Controller and Design Method Based on Interference Principle
  • Metasurface Spin and Wavefront Controller and Design Method Based on Interference Principle

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Embodiment Construction

[0065] The design method of the spin and wave front controller of the present invention will be further described below with two embodiments, and the correctness of the design and the superior performance of the device will be explained.

[0066] According to the design method of the present invention, optimize and determine SRR 1 with SRR 2 , the specific parameters are as follows: R 1 = 2.2, R 2 = 1.4, w = 0.6, p x =p y =7mm, ψ=45° and their opening widths are 21.5mm and 1.5mm, respectively. In the optimization process, according to the specific frequency (central operating frequency f 0 ) and phase difference To preliminarily design the outer radius R alone 1 and R 2 , first roughly determine R 1 and R 2 , such that f 0 fall on SRR 1 The high-frequency and low-frequency modes are in the middle and close to the SRR 2 The low-frequency mode of the present invention is established in the commercial simulation software CST then including SRR 1 with SRR 2 Composi...

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Abstract

The invention belongs to the technical field of metasurface electromagnetic control, in particular to a metasurface spin and wavefront controller based on the principle of interference and a design method thereof. The spin and wave front controllers of the present invention include two spin and wave front controllers; one can produce non-diffracting Bessel beams in the RCP state, and can realize the reduction of the radar scattering cross section in the LCP state; one in the LP state The switching from 4-beam vortex to 2-beam vortex can be realized at different frequencies of the wave; the spin and wavefront controller metasurface is controlled by M*N have the same structural parameters but different rotation angles Φ The metasurface units are arranged periodically and equally spaced in a two-dimensional plane; the metasurface units have diode circular polarization dichroism, and the overall rotation angle at different positions is determined according to the realized function and geometric Bell phase calculation. The invention utilizes the circular polarization dichroism to simultaneously realize the regulation of the hand direction and the complex wavefront, and has the advantages of high integration, flexible and changeable functions, wide working frequency band, large polarization extinction ratio, insensitive angle, and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of metasurface electromagnetic control, and in particular relates to an arbitrary circularly polarized spin and wavefront controller based on the principle of interference and a design method thereof. Background technique [0002] Metasurface, as a flat two-dimensional form of metamaterial, is composed of a series of subwavelength artificial electromagnetic structures arranged in a certain way. Because of its thin thickness, simple processing and production, and strong electromagnetic wave control ability, it has aroused strong research interest of scientific and technical personnel. In particular, the use of metasurfaces to flexibly control the amplitude and phase of electromagnetic scattering or simultaneously control the amplitude and phase is widely used in modern microwave / optical communication systems. However, the functions realized by metasurfaces in the past are only realized under specific polariz...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01Q15/00H01Q17/00
CPCH01Q15/0046H01Q17/007H01Q17/008
Inventor许河秀彭清张小宽王光明袁方
OwnerAIR FORCE UNIV PLA