Hi, I am trying to simulate a microstrip structure in Hspice.The structure has two traces both with via's.I am trying to do with equivalent circuit of a via. i.e. with L and C.Do i need to consider the coupling effect in between the via's? if so any formulas to find that? Thanks palusa Do you Yahoo!? Yahoo! Finance Tax Center - File online. File on time. ------------------------------------------------------------------ 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 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