A New Impedance Matching Method for an Ultra-Wide Band and Dual Circularly Polarised Feed

	A New Impedance Matching Method for an Ultra-Wide Band and Dual Circularly Polarised Feed
	Li, Sha1 ; Yan, Yi Hua1 ; Wang, Wei 1; Chen, Zhi Jun1 ; Liu, Dong Hao1 ; Zhang, Fu Shun 2; Jeffrey, Natasha 3
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
	2016-12-13
卷号	33
关键词	Astronomical instrumentation methods: analytical methods and techniques
英文摘要	In traditional antenna design, metal components are not placed in the central part of the antenna as they change the characteristics of near field radiation. However, we show that placing a metal ring in the centre of the strip lines, which connect the ends of folded high-frequency dipoles, does not damage the performance of the feed. Instead it significantly improves the voltage standing wave ratio of the feed whilst other performance indicators are not compromised. Thus, our findings show an excellent way of improving the wide band feed. Based on this foundation, a new circularly polarised feed for operation between 0.4 to 2 GHz is introduced for the Chinese Spectral Radioheliograph in this paper. The issue of a feed impedance matching network is investigated. By optimising the impedance matching, the performance of the feed is enhanced with respect to the previous realisations of the Eleven feed. The simulation and experimental results show that the gain of the feed is about 10 dBi, and the VSWR is less than 2:1. In addition, the feed has a low axial ratio, fixed phase centre location, and constant beam width in the range of 0.4 to 2 GHz.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	REFLECTOR ANTENNAS ; RADIOHELIOGRAPH
收录类别	SCI
语种	英语
WOS记录号	WOS:000390809500001
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6819]
专题	国家天文台_太阳物理研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China 2.Xidian Univ, Xian 710071, Peoples R China 3.Univ Glasgow, Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
推荐引用方式 GB/T 7714	Li, Sha,Yan, Yi Hua,Wang, Wei,et al. A New Impedance Matching Method for an Ultra-Wide Band and Dual Circularly Polarised Feed[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,2016,33.
APA	Li, Sha.,Yan, Yi Hua.,Wang, Wei.,Chen, Zhi Jun.,Liu, Dong Hao.,...&Jeffrey, Natasha.(2016).A New Impedance Matching Method for an Ultra-Wide Band and Dual Circularly Polarised Feed.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,33.
MLA	Li, Sha,et al."A New Impedance Matching Method for an Ultra-Wide Band and Dual Circularly Polarised Feed".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 33(2016).