Both are very good tools. Don't forget Agilent has resurrected their EM software and call it EMDS. There are also others out there that are good. I personally like CST because I have had better response from their customer support team. I also like the fact that I can get time-domain and frequency-domain using the same interface. There is a link to ADS which I find convenient. Otherwise, I find the two nearly equal in performance and usability. -- Daniel ----- Original Message ----- From: "QU Perry" To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] CST vs. HFSS Date: Thu, 7 Dec 2006 13:11:21 -0600 Hi, I believe many of you SI guys faced the same choice and made your call. I would really appreciate if you can share your experience on these two very different yet both very capable full wave tools, specifically for signal integrity application, i.e, broadband characterization of passive interconnect in most cases. Which one you chose and why and are you happy with your choice ? You can reply me on or off list. Thanks Perry =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20 Perry Qu=20 Design & Qualification, Alcatel-Lucent 600 March Road, Ottawa ON, K2K 2E6, Canada=20 DID: 613-7846720 Fax: 613-5993642=20 Email: perry.qu@xxxxxxxxxxxxxxxxxx=20 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20 -- Low Prices, Wide Selection of Gas Masks Everyday low price guarantee. We offer special police discounts and an extremely wide selection of gas masks, filters and huge selection of preparedness gear. http://a8-asy.a8ww.net/a8-ads/adftrclick?redirectid=24e08df2353d2e6cb9bae3a0e3c8c61e ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu