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一种超宽带相控阵天线单元设计

  

  1. (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)
  • 收稿日期:2019-03-04 出版日期:2019-09-23 发布日期:2019-09-23
  • 作者简介:侯建春(1994-),女,山东枣庄人,硕士研究生,研究方向:超宽带相控阵天线,E-mail: 652737764@qq.com; 赵凤军(1963-),男,研究员,博士生导师,研究方向:雷达系统和射频微波技术; 吴亮(1989-),男,助理研究员,硕士,研究方向:相控阵天线; 袁诚(1994-),男,江苏盐城人,硕士研究生,研究方向:反射面天线设计。
  • 基金资助:
    国家重点研发计划项目(2017YFB0502700)

An Element of UWB Phased Array Antenna

  1. (1. University of Chinese Academy of Sciences, Beijing 100049, China;
    2. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
  • Received:2019-03-04 Online:2019-09-23 Published:2019-09-23

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。

关键词: 超宽带, 宽角扫描, 相控阵, Vivaldi天线

Abstract: 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.

Key words: ultra-wideband, wide-angle scanning, phased array antenna, Vivaldi antenna

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