A Passivity Enforcement Scheme for Delay-Based Transmission Line Macromodels

@article{Chinea2007APE,
  title={A Passivity Enforcement Scheme for Delay-Based Transmission Line Macromodels},
  author={Alessandro Chinea and Stefano Grivet-Talocia},
  journal={IEEE Microwave and Wireless Components Letters},
  year={2007},
  volume={17},
  pages={562-564}
}
This letter presents an algorithm for the enforcement of passivity in transmission-line macromodels based on the generalized method of characteristics. The algorithm is based on first-order perturbations of the solutions to a frequency-dependent eigenvalue problem. The theoretical formulation provides an extension of techniques that were available only for lumped models to the more general class of delay-based models.