In rec.radio.amateur.antenna Roy Lewallen wrote:
I'd appreciate any recommendations for an inexpensive Smith chart based
program which can be used for the design of basic matching networks and
the like.

Try QUCS:

http://qucs.sourceforge.net/

I have used it to help in the design of RF matching circuits. It accepts
S-parameter model input, and depicts sim results on a Smith chart.

Take care,
-Chris

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| Christopher Cole, Cole Design and Development |
| Embedded Electronics and Software Design http://coledd.com |