[SI-LIST] : Transmission Lines Formulae

Lum Wee Mei (lweemei@dso.org.sg)
Wed, 13 Jan 1999 10:01:00 +0800

While working on my Z calculation for transmission line, I noticed that
different reference books provide different variations of the
transmission line formulae be it microstrip or stipline.

As a designer, I am expected to be proffesional in my work and able to
explain the rationale why I use the formulae from this reference book
and not the other. Can someone enlighten me on which formula to use and
the reason, if any?

BTW, an engineer in another dept of mine mentioned that I need not have
to bother with manual Z calculation because the PNC SI tool is able to
extract the information. I have attended the PNC workshop and do not
find it friendly to use. Moreover, the accuracy of the output depend
heavily on the accuracy of the input. That is just my feeling ;)p, I do
not know about the rest of you who have use this PNC SI tool?

Hope to hear from anyone of you.
Thanks and regards.

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