中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
A Wideband Microwave Holography Methodology for Reflector Surface Measurement of Large Radio Telescopes

文献类型:期刊论文

作者Wang, Zan1,2; Kong, De-Qing1,2; Zhang, Hong-Bo1,2; Zhu, Xin-Ying1,2; Liu, Ze-Xin1,2; Liu, Yu-Chen1,2
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2022-09-01
卷号22期号:9页码:12
ISSN号1674-4527
关键词astronomical instrumentation methods and techniques telescopes methods: analytical atmospheric effects
DOI10.1088/1674-4527/ac7fe5
英文摘要Most reflector surface holographic measurements of a large radio telescope utilize a geostationary satellite as the signal source. The shortcoming is that those measurements could only be done at a limited elevation angle due to the satellite's relatively stationary state. This paper proposed a new wideband microwave holographic measurement method based on radio sources to achieve full-elevation-angle measurement with small size reference antenna. In theoretical derivation, the time delay and phase change due to path length and device difference between the antenna under test and reference antenna are compensated first. Then the correct method of wideband holography effect, which is because of antenna pattern differing under different wavelengths when receiving a wideband signal, is presented. To verify the proposed methodology, a wideband microwave holographic measurement system is established, the data processing procedure is illustrated, and the reflector surface measurement experiments on a 40 m radio telescope at different elevation angles are conducted. The result shows that the primary reflector surface root-mean-square at around elevation angles of 28 degrees, 44 degrees, 49 degrees, and 75 degrees are respectively 0.213 mm, 0.170 mm, 0.188 mm, and 0.199 mm. It is basically consistent with the real data, indicating that the proposed wideband microwave holography methodology is feasible.
资助项目National Natural Science Foundation of China[U1831114] ; National Natural Science Foundation of China[11941002] ; National Natural Science Foundation of China[12073048] ; Chinese Academy of Sciences[U1831114] ; Chinese Academy of Sciences[11941002] ; Chinese Academy of Sciences[12073048]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号WOS:000840976100001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences
源URL[http://ir.bao.ac.cn/handle/114a11/87704]  
专题中国科学院国家天文台
通讯作者Kong, De-Qing
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Wang, Zan,Kong, De-Qing,Zhang, Hong-Bo,et al. A Wideband Microwave Holography Methodology for Reflector Surface Measurement of Large Radio Telescopes[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2022,22(9):12.
APA Wang, Zan,Kong, De-Qing,Zhang, Hong-Bo,Zhu, Xin-Ying,Liu, Ze-Xin,&Liu, Yu-Chen.(2022).A Wideband Microwave Holography Methodology for Reflector Surface Measurement of Large Radio Telescopes.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,22(9),12.
MLA Wang, Zan,et al."A Wideband Microwave Holography Methodology for Reflector Surface Measurement of Large Radio Telescopes".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 22.9(2022):12.

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来源:国家天文台

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