引向单元加载的球形弧面测量型天线  

Spherically cambered surface surveying antenna loading with director elements

作　　者：王冠君 朱良 吴兴军 WANG Guanjun;ZHU Liang;WU Xingjun(Shanghai High Gain Technology and Information Corporation,Ltd.,Shanghai 201702,China;School of Cyber Science and Engineering,Southeast University,Nanjing 211100,China)

机构地区：[1]上海海积信息科技股份有限公司,上海201702 [2]东南大学网络空间安全学院,南京211100

出　　处：《导航定位学报》2021年第6期16-23,共8页Journal of Navigation and Positioning

摘　　要：针对传统测量型卫星导航天线成本高昂、体积大和质量较重等问题,为推广高精度导航和位置服务在各类新领域的推广和应用,研究了覆盖北斗三号全球卫星导航系统(BDS-3)及全球卫星导航系统(GNSS)全频段的测量型天线。天线主辐射体为圆球形的弧面薄片结构,其周围加载了由竖直和水平弧形金属结构组成的引向单元,还包括覆盖天线整个工作带宽的高效率阻抗匹配网络和低损耗功分、高相位平衡度馈电网络。仿真和实测结果表明天线相对工作带宽达到了32%以上,BDS-3及GNSS频段的增益均在4.5 dB以上,并展现出优异的右旋圆极化辐射特性和抗多路径能力。对天线平均相位中心位置进行了准确标定,结合测绘级接收机实现双天线近10 mm的定位精度和小于0.12°定向准确度。Aiming at the problems of high cost,large volume and heavy weight of traditional satellite navigation surveying antenna,in order to promote the popularization and application of high precision navigation and location service in various new fields,a surveying antenna covering the whole frequency band of BeiDou-3 navigation satellite System(BDS-3)and Global Navigation Satellite System(GNSS)was investigated.The antenna comprises a spherically cambered surface radiator,loads with vertical and horizontal arc-shaped metal structures,and contains a high-efficiency impedance matching network and a feed network with low insertion loss and high phase balance covering the whole working bandwidth as well.Simulation and experimental results showed that the relative operating bandwidth of the antenna exceeded 32%,gain of all the bands of BDS-3 and GNSS was above 4.5 dB,and excellent right-handed circularly polarized radiation characteristics and prominent antimultipath capability were exhibited.The position of the average phase center of the antenna was calibrated accurately,the positioning accuracy was close to 10 mm and the orientation accuracy was less than 0.12°conducted with a survey receiver and two antennas.

关 键 词：测量型天线 球形弧面辐射体 引向单元 高精度定位和定向 

分 类 号：TN828.5[电子电信—信息与通信工程]