倾斜波束圆极化天线的CSRR-FS结构设计研究  

Research on CSRR-FS Structure of Circularly Polarized Antenna with Tilted Beam

作　　者：李思佳[1] 曹祥玉[1] 郑秋容[1] 刘涛[1] 陈校平[1] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《电子学报》2014年第10期2123-2128,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61271100);中国博士后科学基金(No.2012T50878);陕西省自然科学基础研究重点项目(No.2010JZ010);陕西省自然科学基础研究计划(No.2012JM8003);空军工程大学博士生创新课题(No.kgd080914002)

摘　　要：为了拓展倾斜波束圆极化天线(Circularly Polarized Antenna with Tilted Beam,CPA-TB)的带宽,在分析了该天线结构及其特征的基础上,提出了一种花纹式螺旋臂(Flower-Spiral,FS)协同互补开口谐振环(complementary split ring resontor,CSRR)的CSRR-FS结构.该结构通过FS增加了天线表面电流路径,实现了天线驻波比(voltage standing wave ratio,VSWR)的拓展;利用CSRR改变了低频点反射板的电流分布,实现反射板小型化的同时,减小了天线的交叉极化分量,增强了天线的辐射性能,拓展了天线的轴比带宽.仿真和实测结果表明:与普通的平面反射板相比,在保证圆极化、波束倾角30°的条件下,基于CSRR-FS结构的CPA-TB相对带宽为24%(5.5-7GHz),天线工作带宽拓展了1.8倍.CSRR-FS结构的提出为CPA-TB带宽的拓展提供了新的途径.Based on the analysis of the configuration and the character of the circularly polarized antenna w ith tilted beam,a novel CSRR-FS（ Complementary Split Ring Resonator w ith Flow er-Spiral,CSRR-FS） structure is proposed to increase the bandw idth of the antenna.This structure is designed through the flow er-spiral arm and five complementary split ring resonator（ CSRR） splits loaded on ground plane.The VSWR（ voltage standing w ave ratio） is enhanced through the flow-er-spiral structure.And respectively,five CSRR splits are loaded on the perfect electronic conductor ground plane to miniaturize the ground plane and decrease the cross-polarization component.The axial ratio is improved through the ground plane loaded five CSRR splits.Simulated and measured results both show that the relative bandw idth of the novel antenna w ith the CSRR-FS structure is 24% from 5.5GHz to 7GHz in the condition of circularly polarized radiation.And w hile,it is an azimuth angle of 30° tilted beam by the CSRR-FS structure.The bandw idth increases 1.8 times as w ide as one w ithout the CSRR-FS structure in the same condition.The proposed structure is an effectively method for increasing the bandw idth of circularly polarized antenna w ith tilted beam.

关 键 词：圆极化天线 倾斜波束 花纹式螺旋臂结构 互补开口谐振环 

分 类 号：TN82[电子电信—信息与通信工程]