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A Q-band two-beam cryogenic receiver for the Tianma Radio Telescope
Zhong, Wei-Ye1,2,3; Dong, Jian1,2; Gou, Wei1,2; Yu, Lin-Feng1,2; Wang, Jin-Qing1,2; Xia, Bo1,2; Jiang, Wu1; Liu, Cong1; Zhang, Hui1; Shi, Jun3; Yin, Xiao-Xing3; Shi, Sheng-Cai2,4; Liu, Qing-Hui1,2; Shen, Zhi-Qiang1,2
2018-04-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume18Issue:4Pages:14
Abstract

A Q-band two-beam cryogenic receiver for the Tianma Radio Telescope (TMRT) has been developed, and it uses the independently-developed key microwave and millimeter-wave components operating from 35 to 50GHz with a fractional bandwidth of 35%. The Q-band receiver consists of three parts: optics, cold unit assembly and warm unit assembly, and it can receive simultaneously the left-handed and right-handed circularly polarized waves. The cold unit assembly of each beam is composed of a feed horn, a noise injection coupler, a differential phase shifter, an orthomode transducer and two low-noise amplifiers, and it works at a temperature range near 20K to greatly improve the detection sensitivity of the receiving system. The warm unit assembly includes four radio-frequency amplifiers, four radio-frequency high-pass filters, four waveguide biased mixers, four 4-12GHz intermediate-frequency amplifiers and one 31-38GHz frequency synthesizer. The measured Q-band four-channel receiver noise temperatures are roughly 30-40K. In addition, the single-dish spectral line and international very long baseline interferometry (VLBI) observations between the TMRT and East Asia VLBI Network at the Q-band have been successfully carried out, demonstrating the advantages of the TMRT equipped with the state-of-the-art Q-band receiver.

Keywordtelescopes instrumentation: interferometers methods: observational
DOI10.1088/1674-4527/18/4/44
WOS KeywordWIDE-BAND ; ORTHOMODE TRANSDUCER ; PHASE-SHIFTER ; GHZ BAND ; DESIGN ; PERFORMANCE ; AMPLIFIERS ; ASTRONOMY ; ARRAY ; HORNS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000430282700008
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22473
Collection中国科学院紫金山天文台
Corresponding AuthorZhong, Wei-Ye
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Southeast Univ, Sch Informat Sci & Engn, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhong, Wei-Ye,Dong, Jian,Gou, Wei,et al. A Q-band two-beam cryogenic receiver for the Tianma Radio Telescope[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(4):14.
APA Zhong, Wei-Ye.,Dong, Jian.,Gou, Wei.,Yu, Lin-Feng.,Wang, Jin-Qing.,...&Shen, Zhi-Qiang.(2018).A Q-band two-beam cryogenic receiver for the Tianma Radio Telescope.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(4),14.
MLA Zhong, Wei-Ye,et al."A Q-band two-beam cryogenic receiver for the Tianma Radio Telescope".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.4(2018):14.
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