hi folks, Maxwell SV a quite accurate but free tool to analyse such a problem is available at http://www.ansoft.com/downloads.cfm it will alow to analyse the skin depth and trace width effects Regards Giancarlo ________________________________ Da: si-list-bounce@xxxxxxxxxxxxx per conto di Yuriy Shlepnev Inviato: gio 11/10/2007 23.17 A: j.jebakumarsamuel@xxxxxxxxxxxxx; si-list@xxxxxxxxxxxxx Oggetto: [SI-LIST] Re: Trace Width and Skin Effect Loss Hi Jebakumar, There are no simple equations to estimate losses in differential microstrip lines over a wide frequency band. Skin-effect in microstrip lines for instance is not separable from the edge and proximity effects and from the dielectric loss. Strip edges and dielectric polarization change the current distribution in the strip and hence the conductor-related loss. This effect causes faster than sqrt(frequency) growth of the conductor-related losses with frequency. Additional factor that contributes to faster growth of loss with frequency is roughness. See a simple investigation of losses for single and differential microstrip lines in http://www.simberian.com/Papers/LossesInMicrostripLine.pdf. Best regards, Yuriy Yuriy Shlepnev Simberian Inc. www.simberian.com -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of J.Jebakumar Samuel Sent: Thursday, October 11, 2007 1:55 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Trace Width and Skin Effect Loss Hi All, What is the relation ship between trace width (differential) and skin effect loss? Jebakumar Samuel ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net <http://www.si-list.net/> 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 ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net <http://www.si-list.net/> 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 ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net 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