DocumentCode
923090
Title
Cryogenic Parametric Amplifier Noise Performance at 4.2 K
Author
Wilson, William J. ; Dickman, Robert L. ; Berry, Gerald G.
Volume
28
Issue
3
fYear
1980
fDate
3/1/1980 12:00:00 AM
Firstpage
186
Lastpage
190
Abstract
Results of an experiment in which a 4.5- -5.0-GHZ paramp was operated at 4.2 K are reported. The measured noise temperature at 4.2 Kwas 12 K. This is 6 K lower than the unit´s noise temperature at its normal operating point of 18 K. It is concluded that varactor heating by the pump oscillators limited the improvement in noise performance. Prospects for further improvements in paramp noise temperature using better varactors are discussed.
Keywords
Cryogenics; Helium; Low-noise amplifiers; Noise reduction; Oscillators; Radio astronomy; Receivers; Superconducting device noise; Temperature; Varactors;
fLanguage
English
Journal_Title
Microwave Theory and Techniques, IEEE Transactions on
Publisher
ieee
ISSN
0018-9480
Type
jour
DOI
10.1109/TMTT.1980.1130039
Filename
1130039
Link To Document