Wedge, Scott W. and Rutledge, David B. (1991) Noise waves and passive linear multiports. IEEE Microwave and Guided Wave Letters, 1 (5). pp. 117-119. ISSN 1051-8207 http://resolver.caltech.edu/CaltechAUTHORS:WEDieeemgwl91
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Noise waves are a powerful means for characterizing noise in microwave circuits. A simple derivation is given for the relation between a passive circuit's noise-wave correlation matrix and its scattering matrix. It is shown that this relation, referred to as Bosma's theorem, can be readily derived from the fundamental principle that a passive multiport in thermodynamic equilibrium with reflectionless terminations produces uncorrelated output waves.
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