基于特征模分析的超表面天线小型化设计  

Miniaturization Design of Metasurface Antennas Based on Characteristic Mode Analysis

作　　者：张顺 杨雪松 ZHANG Shun;YANG Xuesong(School of Physics,University of Electronic Science and Technology of China,Chengdu 611731,China;The Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China,Huzhou 313001,China)

机构地区：[1]电子科技大学物理学院,四川成都611731 [2]电子科技大学长三角研究院(湖州),浙江湖州313001

出　　处：《无线电工程》2022年第2期250-255,共6页Radio Engineering

基　　金：国家自然科学基金(61731005)。

摘　　要：将超表面结构作为天线的辐射单元,可以降低天线剖面,拓展其带宽,并改善其辐射性能。特征模分析的方法可以用来揭示超表面天线的小型化机理并提供设计思路。基于此方法,设计了3个小型化的超表面天线,并进行了仿真验证。3个超表面天线的辐射单元尺寸分别减小到0.53λ_(0)×0.51λ_(0),0.50λ_(0)×0.49λ_(0)和0.35λ_(0)×0.29λ_(0),与4×4方形贴片单元构成的超表面天线相比,尺寸均缩减了20%以上,实现了超表面天线的小型化。Using a metasurface structure as the radiating layer of an antenna can reduce its profile,expand its operating bandwidth,and improve its radiation performance.The miniaturization mechanism of metasurface antenna can be revealed and the design ideas can be provided by Characteristic Mode Analysis(CMA).Based on CMA,three miniaturized metasurface antennas are designed,and their performances are verified by simulation.The dimensions of radiation elements of the three metasurface antennas are reduced to 0.53λ_(0)×0.51λ_(0),0.50λ_(0)×0.49λ_(0) and 0.35λ_(0)×0.29λ_(0),respectively,which are more than 20%smaller than those of the metasurface antenna composed of 4×4 square patch units,and the miniaturization of metasurface antenna is realized.

关 键 词：天线 特征模分析 超表面 小型化 

分 类 号：TN821.3[电子电信—信息与通信工程]