一种超宽带相控阵天线单元设计  

An Element of UWB Phased Array Antenna

作　　者：侯建春 赵凤军[2] 吴亮 袁诚 HOU Jian-chun;ZHAO Feng-jun;WU Liang;YUAN Cheng(University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院电子学研究所,北京100190

出　　处：《计算机与现代化》2019年第9期72-76,89,共6页Computer and Modernization

基　　金：国家重点研发计划项目(2017YFB0502700)

摘　　要：为了提高相控阵天线的超宽带和宽角扫描性能,提出一种新型全金属Vivaldi天线阵元。利用仿真软件CST对Vivaldi天线阵元建立模型、仿真与优化,最终该天线在2~18 GHz的频段内,其VSWR≤2,具备超宽带特性;针对扫描盲区的问题,提出下宽上窄的创新型侧面结构,优化电流路径,消除扫描盲区,最终可实现全频带范围内±45°的宽角扫描特性。仿真结果表明,该天线具有超宽带、宽角扫描的特性,可以满足作为超宽带宽角扫描相控阵天线单元的要求。To improve the ultra-wideband and wide-angle scanning performance of phased array antennas,an all-metal Vivaldi antenna element with ultra-wideband characteristics is designed.The model of the Vivaldi antenna is built and its size is optimized with the simulation software CST.Finally,the VSWR is less than 2 in the bandwidth from 2 to 18 GHz.To solve the problem of scan blindness,an innovative structure with a thicker bottom is proposed,which changes the current path and eliminates the scan blindness,thus achieving a wide scanning angle of±45°in the whole bandwidth.The results indicate that the antenna has ultra-wideband characteristics and wide scanning angle.So it can be applied as UWB phased array antenna element.

关 键 词：超宽带 宽角扫描 相控阵 VIVALDI天线 

分 类 号：TN957.2[电子电信—信号与信息处理]