基于单偏馈抛物面天线空域极化特性的最佳波束宽度研究  

Study of Optimum Beam Width Based on Spatial Polarization Characteristics of Single-Offset-Parabolic Antenna

作　　者：何密[1] 罗佳[1] 李永祯[1] 王雪松[1] 肖顺平[1] 戴幻尧[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《系统仿真学报》2011年第2期376-380,共5页Journal of System Simulation

基　　金：全国优秀博士学位论文专项资助项目(08100101);国家自然科学基金(60802078)

摘　　要：先给出偏馈抛物面天线远场的主极化和交叉极化分量的理论推导,得出其空域极化特性是焦径比和偏馈角的函数。根据实际单偏馈抛物面天线设计中的约束合理设定了天线模型的参数,然后利用专业软件对天线的空域极化特性进行了仿真分析。从大量仿真实验结果中总结了单偏馈抛物面反射天线空域极化特性随着方位角、俯仰角、偏馈角、焦径比改变的变化规律,在此基础上提出了天线空域极化特性处理的最佳波束宽度的概念并给出天线空域极化特性在最佳波束宽度内的变化规律。The co-polar and cross-polar components for single-offset-parabolic antenna in the far field were deduced theoretically and it was concluded that the spatial polarization was the function of focal-length-diameter-ratios and offset angle.Then the parameters of the antenna model were set reasonably according to the practical antenna.The spatial polarization characteristics of the antenna were analyzed by simulations using the professional software.The change rule of the spatial polarization characteristics of the single-offset-parabolic antenna in different azimuth directions,elevation directions,offset angles and focal-length-diameter-ratios were concluded form the plentiful simulation results.Then the notion of the optimum beam width for spatial polarization characteristics processing was proposed from the simulation results.The change rule of the spatial polarization characteristics in the optimum beam width is also shown.

关 键 词：偏馈抛物面天线 空域极化特性 主极化 交叉极化 

分 类 号：TN95[电子电信—信号与信息处理]