高增益圆极化八木阵列天线设计与实现  

Design and implementation of high gain circular polarization Yagi array antenna

作　　者：亢永珍 彭晨阳 KANG Yongzhen;PENG Chenyang(Yangzhou Collaborative Innovation Research Institute Co.Ltd,Shenyang Aircraft Design and Research Institute Yangzhou 225006,China;School of Electronic Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China)

机构地区：[1]沈阳飞机设计研究所扬州协同创新研究院有限公司,江苏扬州225006 [2]西安邮电大学电子工程学院,陕西西安710121

出　　处：《西安邮电大学学报》2024年第5期56-63,共8页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家自然科学基金项目(62106197);陕西省创新能力支撑项目(2023kjxx-128)。

摘　　要：针对现代战机超视距监测系统对远距离通信及目标监测等功能的需求,设计并实现一种高增益圆极化八木阵列天线。天线单元基本结构由两个微带准八木天线正交放置组成,形成圆极化。对天线进行2×2组阵,使得天线左旋和右旋增益均有所提高,同时为组阵后的天线设计具有左旋圆极化和右旋圆极化两个端口的馈电网络。利用有限元法软件和矩量法软件对所设计的天线和馈电网络进行仿真与优化,得到天线的各项参数数值,进行实物加工与测试。测试结果表明,所设计天线的阻抗带宽达到400 MHz(2.08~2.48 GHz),相对带宽达到17%,天线的左旋和右旋增益最大值达到14 dBi,3 dB波束宽度均大于34°,满足超视距监测系统功能需求。For the requirements of over-the-horizon communication,target monitoring,and other functions by modern fighter jet,a high-gain circularly polarized Yagi array antenna is designed.The basic structure of the antenna unit is to have two microstrip quasi-Yagi antennas placed orthogonally to form circular polarization.A 2x2 antenna array is built to increase the left and right rotation gains of the antennas.At the same time,a feeding network with left-handed circular polarization and right-handed circular polarization ports is designed for the array antennas.Finite element method and moment method software are used to simulate and optimize the designed antenna and the feeding network,to obtain the antenna parameters and to process and test the designed antenna.The test results show that the impedance bandwidth of the designed antenna reaches 400 MHz(2.08~2.48 GHz),and the relative bandwidth reaches 17%.The maximum left-handed and right-handed gain of the antenna reaches 14 dBi,and the 3 dB beamwidth is greater than 34°,which meets the design requirements and can be used for over-the-horizon monitoring system.

关 键 词：八木天线 高增益 超视距 圆极化 阵列天线 

分 类 号：TN822.4[电子电信—信息与通信工程]