Title :
Towards the development of a high-sensitivity cryogenic phased array feed
Author :
Roshi, D. Anish ; Warnick, Karl F. ; Brandt, Jim ; Fisher, J. Richard ; Ford, Pam ; Jeffs, B.D. ; Marganian, Paul ; McLeod, Morgan ; Mello, Melinda ; Morgan, Mark ; Norrod, Roger ; Shillue, William ; Simon, Robert ; White, Steven
Author_Institution :
Nat. Radio Astron. Obs., Green Bank, VA, USA
Abstract :
A cryogenic phased array feed operating at L-band is in development for the Green Bank Telescope (GBT). The feed consists of electrically small feed elements optimized for active impedance matching to cooled front end low noise amplifiers (LNAs), down-converters, a real-time streaming data acquisition system, and beamforming algorithms applied in post-processing. A prototype cryogenic array feed was recently tested on the GBT. This results will be an important step towards the development of a new receiver instrument, the focal L-band array for the GBT (FLAG).
Keywords :
UHF antennas; antenna phased arrays; FLAG; beamforming algorithms; down-converters; focal L-band array for the GBT; green bank telescope; high-sensitivity cryogenic phased array feed; low noise amplifiers; real-time streaming data acquisition system; small feed elements; Arrays; Feeds; Impedance; Noise; Receivers; Telescopes; Temperature measurement;
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6930064
