K7ITM wrote:
....
...and there are
some good applications notes from HP about S-parameters, and about RF
measurements in general. You should be able to find many of them on
the internet, with a bit of searching.

Of course you'll have to search at Agilent.com since 'HP' no longer
exists with regards to the the test and measurement world, but to get
you started,

'S-Parameters... Circuit Analysis and Design' a/k/a AN-95, an oldie but
a goodie,
http://cp.literature.agilent.com/lit.../5952-0918.pdf

Enjoy!
- Galen, W8LNA