Stability and Instability Analyses of a Three-port Network
Date Issued
2009
Date
2009
Author(s)
Kuo, Rong-Fa
Abstract
Beginning with the expressions for the input and output reflection coefficients of a two-port network, this dissertation develops the stability and instability analyses of a three-port network by terminating one port, for example the port 3 with load. A two-port series-feedback network is an example of a three-port network with as the terminating network. Chapter 1 then explains the stability conditions and stability factors of a two-port network and a three-port network, respectively. In the following chapters, the unconditional stability boundaries and the conditional instability curves of a two-port network with the third port terminated with are derived with the explicit expressions. This procedure is followed by having each of the other two ports as the terminating network in order to fully characterize the stability and instability of a three-port network. The resulting explicit expressions related to the unconditional stability and the conditional instability of a three-port network are implemented using the Agilent ADS software tool. These derived expressions can not only enhance the computer-aided capability on the stability analysis of a three-port network but also provide useful information for the microwave circuit designer.
Subjects
Reflection coefficient
stability circle
unconditional stability. stability factor
series-feedback
instability
Type
thesis
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