一种用于GPS卫星导航的四臂螺旋圆极化印刷天线  

Design of a quadrifilar helical circularly polarized printed antenna for GPS

作　　者：崔灵菲 吴秉琪 刘长军[1,2] CUI Lingfei;WU Bingqi;LIU Changjun(School of Electronics and Information Engineering,Sichuan University,Chengdu 610064,China;Key Laboratory of Wireless Power Transmission of Ministry of Education,Chengdu 610064,China;Hebei Bowei Integrated Circuits Co.,Ltd.,Shijiazhuang 050000,China)

机构地区：[1]四川大学电子信息学院,四川成都610064 [2]无线能量传输教育部重点实验室,四川成都610064 [3]河北博威集成电路有限公司,河北石家庄050000

出　　处：《应用科技》2019年第6期16-19,共4页Applied Science and Technology

基　　金：国家自然科学基金项目(61271074)

摘　　要：在GPS导航中,作为非跟踪的地面站天线需要具有半球覆盖、宽波束、圆极化的特性,结构紧凑的四臂螺旋天线可以满足该需要。提出了一种新型一体化四臂螺旋印刷天线结构,采用四分之三波长四线螺旋线,通过单端口中心位置馈电实现依次相差90°的馈电网络,形成高增益圆极化波束。实验结果表明:该四臂螺旋印刷天线在1 575.42 MHz的轴比RA≤3 dB,增益大于等于5.6 dBi,具有良好的右旋圆极化辐射特性。天线具有重量轻、尺寸小的优点,且在低仰角时,其圆极化性能也能满足导航系统的要求。As required by the non-tracking ground station antenna in GPS applications, a wide beam, circular polarized,and hemispherical coverage antenna is required. The compact quadrifilar helical antenna meets above requirements. This paper presents a novel quadrifilar helical printed antenna structure of a four-wire helix with three-quarter wavelength,which is fed by a single port at the center with 90° shifts, realizing high gain and circular polarization. Experimental results show that its axial ratio is less than or equal to 3 dB and its gain reaches or exceeds 5.6 dBi at 1 575.42 MHz.Moreover, it generates right-handed circularly polarized radiation. The antenna is light and compact. Besides, at low angle of elevation, its circularly polarized performance meets requirement of the navigation system.

关 键 词：四臂螺旋天线 印刷天线 宽波束 轴比 圆极化 功分相移馈电网络 正交馈电 卫星导航 

分 类 号：TN828.5[电子电信—信息与通信工程]