Hi Shulong, As Sogo pointed out that Rij represents the coefficient of a current (on line j) induced voltage source (present on line i). The physical meaning of the Rij can be complex. Once scenario is that line i and line j share a same return path - when you have current Ii flowing along the line i, a voltage Ii * Rij will be induced on line j, and here Rij is proportional to the "common area" carrying Ii and Ij. The second important scenario is the Rij caused by the so called proximity effect and skin effect. Remember at higher frequencies the current distribution is no longer uniform. In this case, the current distribution on the line i has an impact on the current distribution on line j. Note, Rij is a frequency-dependent term and usually extracted along with the frequency-dependent Lij. Ji -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Sogo Hsu Sent: Tuesday, April 13, 2004 8:53 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: Off diagonal Gij in RLGC matrix Sorry, TYPO. R ij is the ratio of induced voltage at port 'i' caused by the source current at port 'j'. Sogo Hsu, Ph. D. Foxconn --- In si-list@xxxxxxxxxxxxxxx, "Sogo Hsu" <sogo.hsu@xxxx> wrote: > Shulong, > > You can treat Rij as a transfer impedance between port i and j. In > other words, it is the ratio of induced voltage at port i caused by > the source current at port i. Hope it is helpful. > > Sogo Hsu, Ph. D. > Foxconn > > --- In si-list@xxxxxxxxxxxxxxx, slwu <Shulong.Wu@xxxx> wrote: > > Hi Ji, > > > > Then how to understand Rij which confuse me for a long time ?? > > > > Thanks in advance > > > > Shulong > > > > Ji Zheng wrote: > > > > > Chris, > > > > > > Actually Gij is easier to understand compared to Rij.:-) Gij is > the negative > > > of the conductance between line i and line j (in the cross > section) while > > > Gii is the total conductance between line i and ground as well as > other > > > lines. Think of Cij and Cii, they are analogous to Gij and > Gii...... > > > > > > Ji > > > ------------------------------------------------------------------ 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 ------------------------------------------------------------------ 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