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| A Passive Transmission-line Macromodel Based on the Method of Characteristics |
| Yan Xu Li Yu-shan Gao Song Qu Yong-zhe Ding Tong-hao |
| Institute of Electronic CAD, Xidian Univ., Xi’an 710071, China |
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Abstract Although the algorithms based on the Method of Characteristics (MoC) can ensure the transmission-line causality, there is no guarantee of passivity of the resulting macromodels. This paper proposes a new perturbation method for the passivity enforcement of MoC-based macromodels. The method generalizes the recently developed method that is introduced for lumped macromodels, which is based on quadratic programming with equality constraint. This associated optimization problem can be solved by the method of Lagrange multipliers. Numerical examples show that the presented method yields accurate passive macromodels in a limited simulation time.
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Received: 02 July 2010
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Corresponding Authors:
Yan Xu
E-mail: yanxu@mail.xidian.edu.cn
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2011, Vol. 33 
