DocumentCode
1549130
Title
Low-Frequency Noise Sources and Gain Stability in Microwave Amplifiers for Radiometry
Author
Gonneau, Eric ; Escotte, Laurent
Author_Institution
Simulation Instrum. et Mater. pour l´´Anal. Dosimetrique (SIMAD), Univ. de Toulouse, Toulouse, France
Volume
60
Issue
8
fYear
2012
Firstpage
2616
Lastpage
2621
Abstract
In this paper, the impact of low-frequency noise sources on the gain stability of microwave amplifiers is presented. The presence of a thermally activated relaxation process is experimentally demonstrated. To support the experiment, a mathematical model of this additional excess noise source is proposed in the Allan variance analysis. Different microwave amplifiers are also characterized and their stability is compared with the use of the Allan variance.
Keywords
mathematical analysis; microwave amplifiers; radiometry; Allan variance analysis; gain stability; low-frequency noise sources; mathematical model; microwave amplifiers; radiometry; thermally activated relaxation process; Microwave radiometry; Microwave theory and techniques; Noise; Noise measurement; Stability analysis; Temperature measurement; Thermal stability; Allan variance; amplifiers; gain fluctuations; stability;
fLanguage
English
Journal_Title
Microwave Theory and Techniques, IEEE Transactions on
Publisher
ieee
ISSN
0018-9480
Type
jour
DOI
10.1109/TMTT.2012.2202681
Filename
6226812
Link To Document