基于编码电磁超表面的Bessel波束设计

Bessel beam design with coding metasurface

编码电磁超表面构成信息超材料研究领域的一个分支.文中提出了基于编码电磁超表面的Bessel波束产生设计方法,为Bessel波束的产生与调控提供了新的解决方案;同时对基于电磁超表面的Bessel波束产生与设计的基本方法进行了梳理总结.首先通过反射型编码电磁超表面分别设计了不同类型的Bessel波束,包括单波束零阶Bessel波束、双波束零阶Bessel波束、单波束高阶Bessel波束以及双波束高阶Bessel波束;然后对于每一种类型的Bessel波束分别对应给出了有关的设计理论和方法,并通过全波电磁仿真的方法进行了相应的仿真验证;最后,鉴于信息超材料技术的发展,基于编码电磁超表面的Bessel波束设计可以进一步地应用于信息超材料有关的系统设计,如近场无线信息/能量传输、近场雷达探测与成像,这也为信息超材料提供了一种可供选择的应用场景.

Coding metasurface constitutes an important research direction of information metamaterials.In this paper,we propose a design and generation method of Bessel beams through coding metasurface,which provides a new scheme for Bessel beam generation and manipulation.Meanwhile,the general Bessel beam generation methods through metasurface are summarized.Different Bessel beams are generated and designed through the reflective coding metasurface,which include single Bessel beam of the zero order,dual Bessel beams of the zero order,single Bessel beam of high order,and dual Bessel beams of high order.The related design theory and methods are presented for each kind of the designed Bessel beams,and the corresponding full wave electromagnetic simulation models are built and simulated for further validation.Moreover,due to the development of the information metamaterials theory and technology,on the basis of coding metasurface,this Bessel beam design method can also be applied in the related information metamaterials,such as in near-field wireless information/energy transmission,and near-field radar detection and imaging.Bessel beam is also an alternative application scenario for information metamaterials.