编码超表面远场散射波束调控设计

Beam steering design of far-field scattering based on coding metasurface

针对编码超表面远场散射波束的调控,在对相互正交方向的序列进行设计的基础上,利用加法规则,可快速得到超表面的编码序列.加法规则的利用,可减少编码个数,降低设计难度,方便实现对超表面远场散射波束的设计.论文采用金属小棒结构作为超表面单元,进行了实例分析.结果表明,提出的编码序列设计方法,可以有效融合两个正交方向编码序列的散射特性,灵活调控超表面上半空间的散射场.研究方案在通信和雷达等领域具有广泛的应用前景.

As for the control of the far field scattering beams of the coding metasurface,the coding sequence of mutually orthogonal directions are designed first.On this basis,the coding sequence of the metasurface can be quickly obtained by using the addition rule,which can effectively reduce the number of codes,lower the degree of design difficulty,and facilitate the design of the far field scattering beams on the metasurface as well.This paper adopts the metal rod structure as the metasurface unit and carries out an example analysis.The results show that the proposed coding sequence design method can effectively integrate the scattering characteristics of two orthogonal directional coding sequences,and flexibly control the scattering field in the upper half space of the metasurface.The research program has a wide application prospect in the fields of communication and radar.