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Design of Dual Circularly Polarised 2-15 GHz Feed and the Polarisation Degree Measurement for CSRH-II Antenna System
Li, Sha1,2; Yan, Yi Hua1,2; Chen, Zhi Jun1,2; Wang, Wei1,2; Zhang, Fu Shun3
2015-04-14
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
Volume32
AbstractThe Chinese Spectral Radioheliograph is an aperture-synthesis telescope observing the Sun in ultra wide bandwidth on the ground. It contains two arrays Chinese Spectral Radioheliograph-I and Chinese Spectral Radioheliograph-II from 0.4 to 15 GHz. In order to obtain ultra wide-band performance, the cascaded folded dipoles are used in this feed. At the same time, in order to get circularly polarised signals coming from the Sun, a wide-band 90 degrees hybrid is added in the output ports of the feed. This feed has characteristics of about 10 dBi gain, less than 1.5 voltage standing wave ratio. It also has characteristics with low axial ratio, fixed phase centre location, and constant beam width in operating frequencies. Through cross-correlating all combinations of two orthogonal polarisations at each antenna, the polarisation state of the waves is measured and give a differential instrumental delay between two data channels. The relationship between the own polarisation degree of the Sun and the observed polarisation degree is also measured for cross-polarised delay in observing the Sun in this paper.
KeywordCircularly Polarised Polarisation Degree Reflector Antenna
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1017/pasa.2015.14
WOS KeywordRADIOHELIOGRAPH
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000353035300001
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15784
Collection毫米波和亚毫米波技术实验室
Affiliation1.Chinese Acad Sci, Natl Astron Observ China, Key Lab Solar Act, Beijing, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Beijing, Peoples R China
3.Xidian Univ, Xian, Peoples R China
Recommended Citation
GB/T 7714
Li, Sha,Yan, Yi Hua,Chen, Zhi Jun,et al. Design of Dual Circularly Polarised 2-15 GHz Feed and the Polarisation Degree Measurement for CSRH-II Antenna System[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,2015,32.
APA Li, Sha,Yan, Yi Hua,Chen, Zhi Jun,Wang, Wei,&Zhang, Fu Shun.(2015).Design of Dual Circularly Polarised 2-15 GHz Feed and the Polarisation Degree Measurement for CSRH-II Antenna System.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,32.
MLA Li, Sha,et al."Design of Dual Circularly Polarised 2-15 GHz Feed and the Polarisation Degree Measurement for CSRH-II Antenna System".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 32(2015).
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