一种基于FSS的双频双圆极化器  

A Dual-frequency Dual-circle Polarizer Based on FSS

作　　者：夏林峰 陆云龙[1] 黄季甫 XIA Lin-feng;LU Yun-long;HUANG Ji-fu(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》2021年第3期39-42,共4页Wireless Communication Technology

摘　　要：本文设计了一款基于FSS的双频双圆极化器,它能在双频段将输入的线极化波转化为不同旋向的圆极化波。此圆极化器包括四层FSS周期阵列,每层FSS周期阵列单元是曲折线金属条和偶极子金属条的复合结构。根据圆极化器的物理结构建立了等效电路模型,分析了其工作原理。仿真结果表明,在低频段16.4-21.1GHz和高频段29-32GHz内,圆极化器分别产生不同旋向的圆极化波,且圆极化轴比小于3dB。此圆极化器与线极化天线结合,能够实现单口径天线在两个频段同时发射和接收不同旋向圆极化波的功能,大大简化了通信系统的复杂性和成本。In this paper,a dual-frequency double circular polarizer based on FSS is designed,which can convert input linearly polarized waves into circularly polarized waves with different rotational directions in dual frequency bands.The circular polarizer consists of four layers of FSS periodic arrays,and each layer of FSS periodic array elements is a composite structure of zigzag metal bars and dipole metal bars.According to the physical structure of circular polarizer,the equivalent circuit model is established,and its working principle is analyzed.The simulation results show that the circular polarizer produces circularly polarized waves with different rotational directions in low frequency band 16.4-21.1 GHz and high frequency band 29-32 GHz,and the circular polarization axis ratio is less than 3 dB.Combined with the linearly polarized antenna,the circular polarizer can achieve the function of transmitting and receiving different rotational circularly polarized waves in two frequency bands at the same time,which greatly simplifies the complexity and cost of the communication system.

关 键 词：FSS 双频双圆极化 圆极化器 轴比 

分 类 号：TN82[电子电信—信息与通信工程]