Analysis and Research on the Centimeter Band Receiver Amplitude Calibration Method

doi:10.1155/2020/8484610

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	Analysis and Research on the Centimeter Band Receiver Amplitude Calibration Method
	Wang, Kai 1,2,3; Chen, Maozheng 1,2,3; Ma, Jun 1,2,3; Duan, Xuefeng 1,2,3; Wang, Yang 1,2,3; Cao, Liang 1,2,3; Yan, Hao 1,2,3; Xiang, Binbin 1,2
刊名	ADVANCES IN ASTRONOMY
	2020-07-03
卷号	2020 页码:8484610
ISSN号	1687-7969
DOI	10.1155/2020/8484610
产权排序	1
英文摘要	The receiver is a signal receiving device in a radio telescope system. As an important parameter to characterize the receiver performance, noise temperature is very practical to calibrate accurately. The traditional receiver noise temperature calibration method is the cold and ambient load method. Through the establishment of K-band ambient receiver, and its amplitude calibration test platform of the cold and ambient load method, chopper wheel method, and ambient and hot load method, comparison and analysis of the above three methods were carried out. The test and calculation results show that the test accuracy of the cold and ambient load method is about 1.3%, that of the chopper wheel method (nonlow elevation) is about 3%, and that of the ambient and hot load method is about 9%. The test accuracy of the ambient and hot load method is slightly lower than that of the above two methods. The analysis is mainly due to the uncertainty of the hot load temperature and the small temperature difference between the two loads, which leads to the deterioration of the overall accuracy. But the advantage is that the method can perform real-time calibration in the process of observation, and it is easier to implement than the traditional cold and ambient load method. The results of noise temperature measurement are compared with those of theoretical calculation, the error is basically within 10%, and it can satisfy the demand of the noise temperature test. In the future, we expect that on the basis of increasing the hot load temperature, further experiments were carried out on the thermostatic treatment of hot load and the accuracy of temperature acquisition, and finally we hope that this method can better meet the testing requirements of receiver noise temperature and radio source amplitude calibration.
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资助项目	Xinjiang Key Laboratory of Radio Astrophysics (Microwave Technology)[2015KL012] ; National Natural Science Foundation of China[11973078] ; National Natural Science Foundation of China[11903077] ; National Natural Science Foundation of China[11603064] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2019D01A99] ; Operation, Maintenance, and Upgrading Fund for Astronomical Telescopes and Facility Instruments
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000552776700001
资助机构	Xinjiang Key Laboratory of Radio Astrophysics (Microwave Technology) ; National Natural Science Foundation of China ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Operation, Maintenance, and Upgrading Fund for Astronomical Telescopes and Facility Instruments
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3600]
专题	射电天文研究室_天线技术实验室
通讯作者	Wang, Kai
作者单位	1.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.Xinjiang Key Lab Microwave Technol, Urumqi 830011, Peoples R China
推荐引用方式 GB/T 7714	Wang, Kai,Chen, Maozheng,Ma, Jun,et al. Analysis and Research on the Centimeter Band Receiver Amplitude Calibration Method[J]. ADVANCES IN ASTRONOMY,2020,2020:8484610.
APA	Wang, Kai.,Chen, Maozheng.,Ma, Jun.,Duan, Xuefeng.,Wang, Yang.,...&Xiang, Binbin.(2020).Analysis and Research on the Centimeter Band Receiver Amplitude Calibration Method.ADVANCES IN ASTRONOMY,2020,8484610.
MLA	Wang, Kai,et al."Analysis and Research on the Centimeter Band Receiver Amplitude Calibration Method".ADVANCES IN ASTRONOMY 2020(2020):8484610.