Assuming "L11" is "Self Inductance" and "L12" is "Mutual Inductance", then yes, you have it correct. Assuming the same for capacitance, then no; it is incorrect. Codd = Cself + 2*Cmutual Ceven = Cself That said, your formulas are correct for capacitance-matrix notation (which I have come to understand to really be electrostatic induction matrix). Here, C11 is Cself + Cmutual(s). Accordingly, if you carry through the math, the formulas you show are correct. Given the fact that you have magnitudes specified, my guess is that you're doing it correct (i.e., Cij where i /= j, Cij < 0). Pat > > Hi, > > Does anyone know the formula for even and odd mode capacitances and > inductances of coupled lines? Is Lodd = L11-L12, Leven=L11+L12, > Codd=C11+|C12| and Ceven=C11-|C12|? Thanks in advance! > > ------------------------------------------------------------------ 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.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