基于FSS的宽带宽角圆极化器  

A wide band and wide angle circular polarizer based on FSS

作　　者：楼盈颖 LOU Yingying(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《无线通信技术》2023年第3期58-62,共5页Wireless Communication Technology

基　　金：国家重点研发计划(2018YFB1802100);国家自然科学基金(61801252,U1809203,61631012,61774098);广东省重点领域研发计划(2019B010156004);浙江省省属高校基本科研业务费专项资金(SJLY2020001)。

摘　　要：本文提出一种基于频率选择表面(FSS)的透射型圆极化器,它能将天线的线性极化转换为圆极化。此极化器具有相同的四层结构,每层FSS周期阵列单元由曲折线栅、方形环和四个边角的短金属条组成。在y-z平面垂直入射的情况下,仿真轴比在16.87-27.71GHz的宽带范围内保持在3-dB以下,相对带宽达到48.6%。60°斜入射时,在Ka波段19.16-21.38GHz的频率范围内测量的3-dB轴比带宽仍能达到11%,能实现较好的宽角性能。此圆极化器于线极化天线结合,大大简化了通信系统的复杂性和成本。in this paper,a transmissive type circular polarizer based on frequency selective surface(FSS)is designed,which can convert linear polarization into circular polarization.The polarizer has the same four-layer structure,and each layer of FSS periodic array cells consists of a meander-line,square rings,and short metal strips with four corners.When the y-z plane is vertically incident,the simulation axial ratio stays below 3-dB in the broadband range of 16.87-27.71GHz,and the relative bandwidth reaches 48.6%.At 60°oblique incidence,the 3-dB axial ratio bandwidth measured in the Ka-band frequency range of 19.16-21.38GHz can still reach 11%,which can achieve better wideangle performance.The combination of the circular polarizer with the linearly polarized antenna greatly simplifies the complexity and cost of the communication systems.

关 键 词：FSS 圆极化器 宽带 宽角 

分 类 号：TN82[电子电信—信息与通信工程]