Wayne wrote:
I'm curious about how to use the s-parameters for components to calculate
the "system" s-parameters. The original question is about a single antenna
fed by a transmission line, but I will probably try to analyze more
complicated hookups later.

If I correctly understand what you say, you have the trivial
one-port case of the antenna and the two-port case for the
transmission line. HP's Ap Note 95-1 might be the place to
start in understanding a basic analysis.

http://www.tm.agilent.com/data/stati...-1/an-95-1.pdf
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73, Cecil http://www.w5dxp.com