DocumentCode
1927771
Title
Wideband feeds and low noise amplifiers for large arrays
Author
Weinreb, S. ; Akgiray, A. ; Russell, D.
Author_Institution
Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA
fYear
2011
fDate
13-20 Aug. 2011
Firstpage
1
Lastpage
3
Abstract
The state of the art for feeds and LNAs with frequency ranges approaching one decade will be presented. These components reduce the cost of receivers required to cover a given frequency range and enable observations requiring large bandwidth such as spectral index measurements, search for spectral lines with unknown red shift, and detection of transient events. An example of a 2 to 12 GHz feed will be given and compared in efficiency with an octave band feed. Low noise amplifiers for the 0.5 to 12 GHz range utilizing HEMT and SiGe bipolar transistor will be described.
Keywords
low noise amplifiers; radiotelescopes; receivers; red shift; HEMT; LNA; SiGe bipolar transistor; bandwidth; frequency 0.5 GHz to 12 GHz; frequency 2 GHz to 12 GHz; low noise amplifiers; radio astronomy receivers; redshift; spectral index measurement; spectral lines; transient events; wideband feeds; Feeds; HEMTs; Low-noise amplifiers; Noise; Radio astronomy; Silicon germanium; Wideband;
fLanguage
English
Publisher
ieee
Conference_Titel
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location
Istanbul
Print_ISBN
978-1-4244-5117-3
Type
conf
DOI
10.1109/URSIGASS.2011.6051201
Filename
6051201
Link To Document