A wide-band feed system for SKA band 1 covering frequencies from 350 – 1050 MHz
Authors:
- 1 April 2016
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1-3
Abstract
We present the design of a wideband feed system for the Band 1 of the Square Kilometer Array (project). The Band 1 feed system uses a quad-ridged flared horn (QRFH) optimized for a offset Gregorian dual reflector dish to cover RF frequencies from 350-1050 MHz, and a cryogenic low noise amplifier (LNA). The feed horn is optimized to achieve best A eff /T sys over the entire band, by making trade-off between aperture efficiency and spill over noise contribution. The optimised feed horn shows above 70% efficiency over the entire 3:1 band, with return loss better than 10 dB. The cryostat following the feed has between 9 to 14 K noise, measured at the co-axial connector of the QRFH. The estimated on-sky sensitivity of the feed system is better than specified 4.2 m 2 /K averaged over the entire frequency band.Keywords
This publication has 2 references indexed in Scilit:
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- An Optimal Beamforming Strategy for Wide-Field Surveys With Phased-Array-Fed Reflector AntennasIEEE Transactions on Antennas and Propagation, 2011