平方公里阵中国验证天线光学设计  

Optical design of the Dish Verification Antenna-China(DVA-C) for the square kilometer array

作　　者：杜彪[1,2] 伍洋 周建寨[1,2] 张文静[2] 

机构地区：[1]射电天文技术联合实验室,石家庄050081 [2]中国电子科技集团公司第五十四研究所,石家庄050081

出　　处：《中国科学：信息科学》2015年第8期1001-1014,共14页Scientia Sinica(Informationis)

基　　金：国家重点基础研究发展计划(973计划)(批准号:2013CB837900);国家自然科学基金(批准号:11261140641);国家国际科技合作专项(批准号:2012DFB00120)资助项目

摘　　要：平方公里阵SKA(Square Kilometre Array)将是世界上最大的综合孔径射电望远镜,致力于回答宇宙起源等基本问题.目前SKA项目已进入建设准备阶段,包括中国在内的许多国家正在进行先导天线、相控阵馈源、超宽带单波束馈源等关键技术的试验研究.其中,中国验证天线DVA-C(Dish Verification Antenna-China)是我国针对SKA中频反射面天线阵列提出的技术方案.文章详细介绍了DVA-C的微波光学与馈源的设计思路、方法和研究成果,以及预期达到的指标.由于DVA-C以轴向波束性能最优作为设计原则,对使用相控阵馈源的多波束观测造成了一定影响,故文中对此也进行了仿真和分析,并提出了应对的方案.The SKA（Square Kilometer Array） will be the world＇s largest synthesis radio telescope and will address many fundamental questions about our universe. The SKA has now entered the preconstruction phase.Many countries, including China, are involved in the development of its key technology, such as dish prototyping,phased array feed, and wideband single pixel feed. The Dish Verification Antenna-China（DVA-C） is a prototype being built to most closely meet the requirements of the SKA scientific goals. In this paper, the details of the optical design of the DVA-C are presented, including the dish optics and feeds. Although the DVA-C is designed for optimal performance of bore sight, it is also potentially employed for multibeam observation. Hence, the multibeam performance of the DVA-C is also analyzed.

关 键 词：平方公里阵 射电望远镜 反射面天线 微波光学 馈源 

分 类 号：TH751[机械工程—仪器科学与技术]