Quality of S-parameter models

Audience: All S-parameter model developers and users.

Duration: 60 min (50 min presentation and 10 min Q&A)

Presenter: Yuriy Shlepnev

Takeout: Understanding of S-parameter model quality basics.

Outline: S-parameter models are becoming ubiquitous in design of multi-gigabit serial interconnects. Electromagnetic analysis or measurements are used to build S-parameter models. Very often such models have quality issues and produce different time-domain and even frequency-domain responses in different solvers! All S-parameter models must be pre-qualified for the analysis. This webinar explains theory of S-parameter model quality evaluation. Quality metrics for reciprocity, passivity and causality of S-parameters are introduced. Rational approximation of S-parameters is briefly discussed as an alternative to Touchstone models and as a tool for the final model quality estimation.