DocumentCode :
979753
Title :
A 5 Gc/s parametric reciever for radio astronomy
Author :
Hughes, M.P. ; Moley, E. ; Parenti, D.R. ; Whelehan, J.J.
Author_Institution :
Harvard Radio Astronomy Station, Fort Davis, TX, USA
Volume :
13
Issue :
3
fYear :
1965
fDate :
5/1/1965 12:00:00 AM
Firstpage :
432
Lastpage :
436
Abstract :
This paper describes a highly sensitive radiometer which features a degenerate parametric amplifier operating near ambient temperature. Some important techniques used to assure requisite stability are discussed in detail and a significant problem, namely that of self-generated interference, is briefly examined. Observational results are presented to demonstrate the performance of the system, which has a sensitivity of 
K with a time constant of 10 seconds.
K with a time constant of 10 seconds.Keywords :
Parametric amplifiers; Radio astronomy; Frequency; Helium; Instruments; Interference; Radio astronomy; Radiometry; Receivers; Receiving antennas; Stability; Temperature sensors;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1965.1138452
Filename :
1138452
Link To Document :
