DocumentCode :
126693
Title :
Preliminary design of eleven feed for SKA band 1
Author :
Jian Yang
Author_Institution :
Dept. of Signals & Syst., Chalmers Univ. of Technol., Goteborg, Sweden
fYear :
2014
fDate :
16-23 Aug. 2014
Firstpage :
1
Lastpage :
4
Abstract :
Many challenges are in the design of a feed for reflector antennas in SKA project, such as high aperture efficiency, low noise temperature, low cross-polar level, good circularity of the far-field function, and a very compact size. We present a new design of the Eleven feed as a candidate for SKA band 1 (0.35-1.05 GHz). The configuration of the feed can be for dual polarization either four ports with four single ended low noise amplifiers (LNAs) or two differential LNAs, or two ports with a balun and two single-ended LNAs. The typical performances of the feed over the whole band are: -12 dB reflection coefficient, 60% ~ 70% aperture efficiency, -15 relative cross-polar level, 0.05 dB ohmic loss and a size of 750×250 mm2.
Keywords :
aperture antennas; electromagnetic wave polarisation; low noise amplifiers; microwave antenna arrays; reflectarray antennas; reflector antenna feeds; SKA band 1; SKA project; aperture efficiency; differential LNA; dual polarization; eleven feed; frequency 0.35 GHz to 1.05 GHz; low noise temperature; ohmic loss; reflector antennas; single ended low noise amplifiers; single-ended LNA; square kilometer array; Antenna feeds; Apertures; Coaxial cables; Impedance matching; Reflector antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
Type :
conf
DOI :
10.1109/URSIGASS.2014.6930059
Filename :
6930059
Link To Document :
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