On 2014-09-04 8:18 PM, David Vye wrote: > Cascading s-parameters is fairly straight forward for most EDA tools. You > need to be concerned with the source of the s-parameters (modeled or > measured) and the accuracy with which they were derived. If your analyzing > them in the time domain, you will also want tools that enforce > causality/passivity. > This link covers some of the basics regarding requirements for using > s-parameters in time domain simulations. > http://space.ednchina.com/Upload/2009/6/3/0a40b853-3b4a-42d3-820e-67241743cd1d.pdf Dear Eric, A few years ago we wrote a comprehensive review paper on causality, passivity and their role in using S-parameters in time-domain simulations. P. Triverio, S. Grivet-Talocia, M. S. Nakhla, F. Canavero, R. Achar, “Stability, causality, and passivity in electrical interconnect models,” vol. 30, no. 4, pp. 795-808, 2007. http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4358038 I hope it helps, Piero -- Piero Triverio Assistant Professor, P. Eng. Canada Research Chair in Modeling of Electrical Interconnects Department of Electrical and Computer Engineering University of Toronto Website: www.waves.utoronto.ca/triverio Office: BA5124 Phone: +1 (416) 978 0562 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu