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

fYear

2014

fDate

16-23 Aug. 2014

Firstpage

1

Lastpage

4

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;

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.2014.6930064

Filename

6930064