Ill conditioning loci in noise parameter determination

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Title:	Ill conditioning loci in noise parameter determination
Author:	O'Callaghan Castellà, Juan Manuel; Alegret Ginesta, Alexandre; Pradell i Cara, Lluís; Corbella Sanahuja, Ignasi
Other authors:	Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
Abstract:	An analysis of the problem of noise parameter determination is carried out. It is found that the mathematical problem is ill-posed if all the source reflection coefficients (Γs) used in the measurements fall onto a line, circle or are of a circle in the Smith chart. This is used to expand on existing criteria for selecting Γ s and to rule out sources of accuracy degradation.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció -Microwave circuits -Noise -circuit noise -microwave circuits -two-port networks -Smith chart -accuracy degradation -ill conditioning loci -linear two-port -microwave circuits -noise figure -noise parameter determination -source reflection coefficients -Circuits de microones -Soroll
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Document type:	Article
Published by:	IEE-INST ELEC ENG
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