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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|
|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:||Click here to retrieve PDF version of paper (117KB)|