DocumentCode
984045
Title
Complex-correlation radiometer
Author
Clapp, R.E. ; Maxwell, J.C.
Author_Institution
AirTechnology Corporation, Waltham, MA, USA
Volume
15
Issue
2
fYear
1967
fDate
3/1/1967 12:00:00 AM
Firstpage
286
Lastpage
290
Abstract
The correlation between the signals from the two antennas in a radio interferometer can be described by a complex correlation function. The real and imaginary parts of this function can be measured by a radiometer using two feedback loops to control four noise sources, 
(positive, real), 
(negative, real), 
(positive, imaginary), and 
(negative, imaginary). Theoretical analysis shows the system to be stable against amplifier gain fluctuations, and against moderate fluctuations in the phase shifts of the two amplification channels which are included in the system. Experimental verification is described in a following paper by Hubbard and Erickson [2].
(positive, real), (negative, real), (positive, imaginary), and (negative, imaginary). Theoretical analysis shows the system to be stable against amplifier gain fluctuations, and against moderate fluctuations in the phase shifts of the two amplification channels which are included in the system. Experimental verification is described in a following paper by Hubbard and Erickson [2].Keywords
Correlations; Radiometry; Delay effects; Extraterrestrial measurements; Feedback loop; Fluctuations; Hybrid junctions; Noise level; Noise measurement; Radio control; Radiometry; Receiving antennas;
fLanguage
English
Journal_Title
Antennas and Propagation, IEEE Transactions on
Publisher
ieee
ISSN
0018-926X
Type
jour
DOI
10.1109/TAP.1967.1138875
Filename
1138875
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