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 |
| DOI | 10.1088/1674-4527/20/5/69 |
| 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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