An efficient approach is presented for time-domain sensitivity analysis of lossy multiconductor transmission lines with respect to electrical and/or physical parameters. The proposed method employs delay extraction prior to approximating the matrix exponential stamp of the line and guarantees macromodel passivity. A delay-extraction-based equivalent circuit for sensitivity analysis is derived in a closed form, leading to significant computational advantages.

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Keywords Delay extraction, Matrix rational approximation, Passive macromodels, Sensitivity analysis, Transmission lines
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Journal IEEE Transactions on Microwave Theory and Techniques
Nakhla, N.M. (Natalie M.), Dounavis, A. (Anestis), Nakhla, M.S, & Achar, R. (2005). Delay-extraction-based sensitivity analysis of multiconductor transmission lines with nonlinear terminations. In IEEE Transactions on Microwave Theory and Techniques (Vol. 53, pp. 3520–3530). doi:10.1109/TMTT.2005.857344