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Publication Citation: Noise Characterization of Multiport Amplifiers

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Author(s): James P. Randa;
Title: Noise Characterization of Multiport Amplifiers
Published: October 01, 2001
Abstract: I address the issue of the definition and measurement of noise figure and parameters to characterize multiport devices, particularly differential amplifiers. A parameterization in terms of the noise matrix appears to be the most practical. the noise figure for a given output port is defined and related to the noise matrix and scattering parameters of the device. Two examples are considered in detail: a 3-port differential amplifier and a 4-port mixed-mode amplifier, both with reflectionless terminations. The noise figures, effective input temperatures, and gains are related to the results of a series of hot-cold measurements, as in the familiar two-port case.
Citation: IEEE Transactions on Microwave Theory and Techniques
Volume: 49
Issue: 10
Pages: pp. 1757 - 1763
Keywords: amplifier noise,differential amplifier,multiport amplifier,noise,noise figure,noise matrix,thermal noise
Research Areas: Electronics & Telecommunications, Microelectronics, Electromagnetics
PDF version: PDF Document Click here to retrieve PDF version of paper (117KB)