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Analysis of Correlation and Total Power Radiometer Front-Ends Using Noise Waves

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Corbella Sanahuja, IgnasiMés informacióMés informacióMés informació
Torres Torres, FranciscoMés informacióMés informacióMés informació
Camps Carmona, Adriano JoséMés informacióMés informacióMés informació
Duffo Ubeda, NúriaMés informacióMés informacióMés informació
Vall-Llossera Ferran, Mercedes MagdalenaMés informacióMés informacióMés informació
Rautiainen, Kimmo
Martín Neira, Manuel
Colliander, Andreas
Document typeArticle
Defense date2005-11-30
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
A complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in microwave systems design and takes into account full noise characterization of receivers including mismatch effects. The general formulation is compatible with known total power radiometer analysis and is specially appropriate in correlation radiometers for which the effect of nonideal components, such as input isolators, is analyzed. Along with numerical simulations, simple formulas are given to compute the measured visibility in nonideal conditions. The analysis is validated using experimental results consisting of correlation measurements of four receivers placed inside an anechoic chamber. Good agreement between theoretical predictions and experimental data is observed.
CitationCorbella, I.; Torres, F.; Camps, A.; Duffo, N.; Vall-llossera, M.; Rautiainen, K.; Martín-Neira, M.; Colliander, A.; Analysis of correlation and total power radiometer front-ends using noise waves . IEEE Transactions on geoscience and remote sensing, 2005 , vol. 43, núm. 11, p. 2452-2459. 
URIhttp://hdl.handle.net/2117/989
ISSN0196-2892
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