副面旋转换馈法关键技术及其应用实例  

Key Technologies and Application Examples of Sub-reflector Rotary Feeds-switching Method

作　　者：李燕[1] 赵武林[1] LI Yan;ZHAO Wu-lin(The 39th Research Institute of CETC,Xi'an 710065,China)

机构地区：[1]中国电子科技集团公司第三十九研究所

出　　处：《电子机械工程》2019年第5期1-3,8,共4页Electro-Mechanical Engineering

摘　　要：文中介绍了一种新的换馈方法——副面旋转换馈法,该种换馈方法主要应用在大型射电望远镜上,通过旋转副面的方式实现天线工作馈源的切换。副面旋转换馈法的实现需要以天线副面二次赋型为理论基础、以高精度换馈机构为依托、以高刚度副面支撑结构为前提。文中根据某工程实例分析了该种换馈方法的换馈原理、关键技术以及实现方法,为以后的工程应用提供参考。A new feeds-switching method,sub-reflector rotary feeds-switching method,is introduced in this paper.The method is mainly applied to large radio telescope.The switching of the working feed is realized by rotating the sub-reflector.The realization of the sub-reflector rotary feeds-switching method needs the theory base of the re-shape of antenna's sub-reflector,the reliance of the high-precision feeds-switching mechanism,and the premise of the high-stiffness supporting structure of the sub-reflector.In this paper,the feeds-switching principle,realization method and key technology of this method are analyzed based on an engineering example,which can provide a reference for future engineering applications.

关 键 词：副面旋转 二次赋型 换馈机构 支撑结构 

分 类 号：TN82[电子电信—信息与通信工程]