中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Simulation of FAST EM performance for both the axial and lateral feed defocusing

文献类型:期刊论文

作者Gan, Heng-Qian; Jiang, Peng; Zhu, Kai; Sun, Jing-Hai; Yao, Rui; Yu, Dong-Jun
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2020-05-01
卷号20期号:5页码:5
关键词techniques FAST Telescope telescope efficiency feed position error
ISSN号1674-4527
DOI10.1088/1674-4527/20/5/69
英文摘要Five-hundred-meter Aperture radio Spherical Telescope (FAST) is the world's largest single dish radio telescope, which is located in Guizhou Province, in southwest China. The FAST feed cabin is supported and positioned by six steel cables. The deviation of the feed position and orientation would lead to loss in the telescope efficiency. In this paper, a series of electromagnetic (EM) simulations of the FAST facility with varying feed positions and orientation offsets was performed. The maximum gain of FAST is about 82.3 dBi and the sibelobe is -32 dB with respect to the main beam at 3 GHz. The simulation results have demonstrated that the telescope efficiency loss is more sensitive to the lateral feed deviation compared with the axial deviation. The telescope efficiency would decrease by 8.2% due to the FAST feed position deviation of 10 mm rms when the observing frequency is 3 GHz. The FAST feed deviation basically has no effect on the sidelobes and cross polarization characteristic according to the simulations.
资助项目National Natural Science Foundation of China[11303062]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000536708900001
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.bao.ac.cn/handle/114a11/54724]  
专题中国科学院国家天文台
通讯作者Gan, Heng-Qian; Jiang, Peng
作者单位Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714
Gan, Heng-Qian,Jiang, Peng,Zhu, Kai,et al. Simulation of FAST EM performance for both the axial and lateral feed defocusing[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(5):5.
APA Gan, Heng-Qian,Jiang, Peng,Zhu, Kai,Sun, Jing-Hai,Yao, Rui,&Yu, Dong-Jun.(2020).Simulation of FAST EM performance for both the axial and lateral feed defocusing.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(5),5.
MLA Gan, Heng-Qian,et al."Simulation of FAST EM performance for both the axial and lateral feed defocusing".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.5(2020):5.

入库方式: OAI收割

来源:国家天文台

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