摘要
相位阵馈源是作为多波束馈源使用的小型二维相控阵天线,用以产生多个紧密交叠的波束,扩大射电望远镜的视场,提高巡天效率.文章分析了焦面场匹配与天线效率之间的联系,在单波束和多波束应用方面对相控阵馈源与传统的波导馈源进行了细致的比较,并介绍了相控阵馈源馈电的射电望远镜信噪比模型.作为一种新的馈源技术,相控阵馈源展现出更大的灵活性和更为优异的性能.
Phased array feed（PAF）is a small two-dimensional phased array antenna as the multi-beam feed.The most prominent merit of PAF is the capability of synthesizing closely overlapped beams,leading to continuous field-of-view coverage and faster survey speed.In this paper,the relationship between focal field matching and antenna efficiency is analyzed,radiation performance both in single-pixel and multi-beam applications are compared between PAF and waveguide feeds,and the SNR model of phased array fed radio telescope is introduced.As an emerging feed technology,PAF exhibits more flexibility and better performance.
出处
《电波科学学报》
EI
CSCD
北大核心
2013年第2期348-353,共6页
Chinese Journal of Radio Science
基金
国家重点基础研究发展规划项目计划(973计划)(编号:2012CB821800)
国家自然科学基金国际合作与交流项目(编号:11261140641)
中国科学院重点部署项目资助(编号:KJZD-EW-T01)
