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2009-04-21
Equivalent Graphical Solutions of Terminated Conjugately Characteristic-Impedance Transmission Lines with Non-Negative and Corresponding Negative Characteristic Resistances
By
Progress In Electromagnetics Research, Vol. 92, 137-151, 2009
Abstract
This paper presents the graphical solutions of conjugately characteristic-impedance transmission lines (CCITLs) implemented by periodically loaded lossless transmission lines (TLs), which can exhibit both non-negative (NNCR) and negative characteristic resistances (NCR) with the corresponding propagation constants. The standard T-chart and the extended T-chart are employed to solve CCITL problems with NNCR and NCR cases respectively, depending on the argument of CCITL characteristic impedances. The range of plotting of the standard T-chart and the extended T-chart is always inside or on the unit circle, and always outside or on the unit circle of the voltage reflection coefficient plane, respectively. Two examples of finite periodic TL structures providing both NNCR and NCR cases are given. It is found that both T-charts provide the same input impedance of the corresponding CCITLs as expected, and the standard T-chart is more familiar and easier to deal with.
Citation
Danai Torrungrueng, and Suthasinee Lamultree, "Equivalent Graphical Solutions of Terminated Conjugately Characteristic-Impedance Transmission Lines with Non-Negative and Corresponding Negative Characteristic Resistances," Progress In Electromagnetics Research, Vol. 92, 137-151, 2009.
doi:10.2528/PIER09031001
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