一种S和Ka双频段相控阵卫星动中通天线设计  

A Design of S/Ka Dual-band Phased Array Antenna for Satellite Communication on the Move

作　　者：周家喜[1] 彭立军[1] 张正宇[1] ZHOU Jiaxi, PENG Lijun, ZHANG Zhengyu(The 38th Research Institute of CETC, Hefei 230088, China)

机构地区：[1]中国电子科技集团公司第三十八研究所,安徽合肥230088

出　　处：《无线电工程》2018年第8期690-694,共5页Radio Engineering

基　　金：国家自然科学基金资助项目(61671416)

摘　　要：随着通信卫星资源越来越丰富、卫星通信频段越来越多、应用越来越广泛,各类运动平台对卫星通信的需求也逐渐增多。针对运动平台卫星通信的使用需求,设计了一种S和Ka双频段、一维机械一维相控阵跟踪体制的动中通天线,在Ka频段相控阵天线设计时进行了无源天线与发射组件的综合优化,将发射组件直接安装于天线背面,既节省了安装空间又充分利用波导阵面进行散热;相控阵系统采用BIT行波校正算法,极大地简化了发射组件和波控单元的设计;在伺服跟踪时,分析了载体坐标系与地理坐标系间的变换关系,将波束指向统一到载体坐标系下。完成了样机研制以及相关的试验测试,试验结果表明,该天线具有实时跟踪卫星实现双频段的通信能力。The demands of satellite communication for motion platforms are increasing along with more and more abundant satellite resources,more and more satellite communication bands and wide applications. Aiming at the demands of satellite communication for motion platforms,an S/Ka dual-band phased array antenna for motion platforms is designed,which uses onedimension mechanical and one-dimension phased array tracking scheme. When the Ka band phased array antenna is designed,the passive antenna and transmit component are jointly optimized.The transmit components are installed on the back of the antenna with two advantages of saving the installation space and utilizing the waveguide array for heat emission. At the same time,the traveling-wave matrix-switch built-in test system is used for calibration,which can simplify the design of the transmit component and wave control unit.Meanwhile,in order to unify the beam-pointing to the platform coordinates,the relationships between platform coordinates and geographic coordinates are analyzed.Finally,a prototype is developed and the experiment is completed.The results show that the antenna can track the satellite in real time and realize the two-band communication capability.

关 键 词：双频段 相控阵天线 天线校正 动中通 

分 类 号：TN927[电子电信—通信与信息系统]