Design of the Broadband low-scattering metasurface based on pixelation

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.