In most transmission lines, L decreases slightly with increasing frequency. This happens at a moderately low frequency, in the vicinity of kilohertz to a megahertz; and I believe the inductance change is on the order of ten percent or so. Most field solvers and formulas give you the high frequency inductance, above the region where it changes. Capacitance should be pretty constant up to frequencies where the dielectric constant changes; this is highly dependent on the insulating materials used. If you need to make circuit transformations to change from one equivalent circuit to another, then you will end up with values for R, L, and C that can vary strongly with frequency. That might also happen if you are dealing with a 3-dimensional structure that gets simplified into 2-D transmission line parameters or a simple L/R/C lumped "equivalent" circuit. Regards, Andy > I have found something i.e. > > 1) R : Skin effect will be more at higher frequencies and resistance of a net will be more > at higher frequency (when skin effect is pre dominant) > > 2) L: How is L related with frequency ? > > 3) C: How is C related with frequency? > > Thanks in Advance... > > Regards > Karan ------------------------------------------------------------------ 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 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