Design of the Broadband low-scattering metasurface based on pixelation

Chao Wang, Hui Zhang, Zengrui Li
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Abstract

The method of pixelizing and arranging pixels on metasurface unit are proposed to optimize the design of broadband low-scattering metasurface. The random code is read into Matlab first. Then the corresponding metasurface structure is modelled and simulated to obtain the reflection phase of each metasurface through the API between Matlab and HFSS. Finally, all phases are subtracted in pairs to obtain the phase-difference of any two units. If two units have phase difference range of (180° ± 37°) at the widest continuous frequency band, the two metasurfaces composed of the two units will have the wider 10dB reduction bandwidth than any other simulated unit. The method in this paper can be applied to study of unit patterns that are difficult to express mathematically, and also can be used in creating the data-set for deep-learning.
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基于像素化的宽带低散射超表面设计
为了优化宽带低散射超表面的设计,提出了在超表面单元上进行像素化和像素排列的方法。首先将随机代码读入Matlab。然后对相应的元表面结构进行建模和仿真,通过Matlab和HFSS之间的API获得每个元表面的反射相位。最后,将所有相位成对相减,得到任意两个单元的相位差。如果两个单元在最宽连续频带的相位差范围为(180°±37°),则由两个单元组成的两个超表面将比任何其他模拟单元具有更宽的10dB减小带宽。本文的方法可以应用于难以用数学表达的单元模式的研究,也可以用于创建深度学习的数据集。
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