could you please specify a bit more what is meant by a
Vertical Transmission Line. If it is a transmission line then
its orientation is of no importance, in the case you are speaking
of a transistion between different layers, i.e. a via, then it NOT
a transmission line. In such a case, you could either hunt for simple
formulars (try Brian Wadell's Book: Transmission Line Design Handbook),
or better use a field solver to determine the s-parameters of the via
and build an equivalent circuit model based on these data.
Hope it helps,
--Uwe ________________________________________________________________________________ | | | | Uwe Keller | tel. : +49 5251-60-6181 | | C-LAB / Analog System Engineering | fax : +49 5251-60-6155 | | Fuerstenallee 11 -- 33102 Paderborn -- Germany | email: [email protected] | | | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~