*From*: "D G" <dgun@xxxxxxxxxx>*To*: si-list@xxxxxxxxxxxxx*Date*: Wed, 19 Feb 2003 22:56:47 +0800

I haven't heard of this B-matrix before. Do you have any references? Daniel From: "Zabinski, Patrick J." > > > > With C, if the on-diagonal elements are SELF (not BULK), then the > > on-diagonal element will change if the coupling conductors > > were removed > > while not disturbing the ground reference. > > > > Please correct me if I'm wrong, but... > > Specific to the "C" matrix, several EM tools do not > output a "capacitance" matrix. Instead, they output > an "electrostatic induction" matrix (let's call it > the "B" matrix), and it's quite common/easy to get > them confused. > > Where C11 is considered to be the self capacitance of > a trace (i.e., capacitance of the trace to the ground > plane), B11 is the capacitance of the trace to all > other elements (i.e., planes, traces, etc.) assuming > they were all at ground potential. > > Where C12 is the mutual capacitance between Trace 1 > and Trace 2, B11 is the negative of that. > > A simple translation is necessary between the two: > > C11 = B11 + B12 + B13 + ... > C12 = -B12 > C13 = -B13 > . > . > . > > Pat > ------------------------------------------------------------------ -- __________________________________________________________ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup ------------------------------------------------------------------ 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: http://www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: http://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

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