基于吸散一体隐身超构表面的透射型涡旋电磁波产生器设计  

Design of Transmission Vortex Beam Generator Based on Absorption-Diffusion Integrated Stealth Metasurface

作　　者：石立华 冉峪舟 王建宝 SHI Lihua;RAN Yuzhou;WANG Jianbao(College of Field Engineering,Army Engineering University of PLA,Nanjing 210007,China)

机构地区：[1]陆军工程大学野战工程学院,江苏南京210007

出　　处：《陆军工程大学学报》2022年第1期30-37,共8页Journal of Army Engineering University of PLA

基　　金：国家自然科学基金资助项目(52177013).

摘　　要：涡旋电磁波因其独特的“空心圈”状辐射场强度、螺旋前进的相位波前以及不同模式间相互正交等独特的电磁特性在雷达探测、成像、保密通信等领域有着巨大应用前景。本文设计了一种基于吸散一体隐身超构表面的透射型涡旋电磁波产生器,超构表面在沿+z方向的Vivaldi天线的球面波激励下,可在透射方向高效地产生拓扑电荷数l=+1的涡旋电磁波;而当沿-z方向的平面波照射时,在吸波和散射的共同作用下,能够有效地降低超构表面的后向RCS。本文的研究工作为电磁隐身超构表面的多功能一体化应用与涡旋电磁波在雷达领域的应用提供新的方向。Vortex beams have great application prospects in radar detection,imaging,secure communication and other fields due to their unique electromagnetic characteristics such as“hollow circle”radiation field intensity,spiral phase wavefront and orthogonality between different modes.In this paper,a transmission vortex beam generator based on the absorption-diffusion integrated stealth metasurface was designed,which could efficiently generate vortex beam with topological charge number l=+1 in the transmission direction under the spherical wave excitation of the Vivaldi antenna along the+2;direction,and effectively reduce the backward RCS of the metasurface under the combined mechanism of absorption and diffusion when irradiated by a plane wave along the-z direction.The research in this paper provides a new course for the multi-functional integrated application of electromagnetic stealth metasurface and vortex beams in the radar field.

关 键 词：涡旋电磁波 超构表面 RCS减缩 吸波-散射一体 

分 类 号：O441.4[理学—电磁学]