Bifunctional metasurface integrated device and design method based on amplitude and phase modulation
A technology of integrated devices and metasurfaces, applied in the direction of electrical components, antennas, etc., can solve problems such as ambiguity in working mechanism, hindering practical applications, and being individually regulated
Active Publication Date: 2022-04-26
AIR FORCE UNIV PLA
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Problems solved by technology
Although fruitful research results have been achieved in the integration of amplitude and phase regulation, they are all realized in one linear polarization channel at the same time, and cannot be independently regulated in two completely separated linear polarization states, which seriously hinders practical application
Currently, the design approach to achieve dual function through separate amplitude and phase modulation under two orthogonal linear polarizations is still in its infancy, and its working mechanism is still vague
Method used
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Embodiment Construction
[0046] The specific implementation of the bifunctional metasurface integrated device will be described in detail below with two examples.
[0047] 1. Dual-function metasurface integrated device integrating wave absorption and four-beam radiation I
[0048] First, design the broadband absorber under the excitation of x-polarized wave, that is, the function F 1 . Uniform distribution of R on the I and III layers of the metasurface integrated device s =35Ω / sq "I" shaped ITO unit, which can realize broadband absorption under x-polarized wave excitation. The entire metasurface integrated device is composed of 28×28 units, and the commercial simulation software CST is used to perform FDTD simulation calculation on the array structure [2] , during the simulation, a plane wave irradiation with an electric field along the x direction is used. Such as Figure 7 As shown in (a), it can be seen from the three-dimensional scattering pattern of the xoz plane that compared with the bare...
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Abstract
The invention belongs to the technical field of metasurface electromagnetic regulation, and specifically relates to a dual-function metasurface integrated device and a design method based on amplitude and phase regulation. The dual-function metasurface integrated device of the present invention is composed of M*M metasurface units extended and arranged in a plane; the metasurface unit is an anisotropic structure consisting of a metal floor, a three-layer structure and two dielectric plates; three In the layer structure, layers I and III are "I" shaped ITO resistive films printed on PET film, which are sub-wavelength structures distributed along the x-axis; layer II is composed of "I" shaped metal structures and two metal Composed of patches, it constitutes a dual-mode metal resonator, distributed along the y-axis; the first and third layers of resistive films work under x-polarized waves, and the second-layer metal structure works under y-polarized waves; the first and third layers of The resistive thin film and the metal structure of the second layer are distributed orthogonally; the bifunctional integrated device of the present invention can provide polarization-dependent electromagnetic regulation and function, and has the advantages of high efficiency, easy processing and small thickness.
Description
technical field [0001] The invention belongs to the technical field of metasurface electromagnetic control, and in particular relates to a metasurface integrated device capable of realizing multiple functions and a design method thereof. Background technique [0002] As a two-dimensional form of metamaterials, metasurfaces have attracted extensive attention from researchers from all over the world due to their powerful electromagnetic manipulation capabilities, and have become one of the research hotspots in the scientific community. Because of the unique electromagnetic properties of these natural materials, various microwave devices have been designed and reported. Among them, in order to meet the needs of multifunctional integration on a single plate, various bifunctional metasurfaces dependent on polarization selection have been studied and designed. However, the realization of most of the above bifunctional metasurfaces only depends on the phase control in two linear p...
Claims
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IPC IPC(8): H01Q15/00H01Q17/00
CPCH01Q15/0026H01Q15/0086H01Q17/00
Inventor 许河秀王朝辉王彦朝王少杰王明照
Owner AIR FORCE UNIV PLA