On Apr 12, 11:25 am, 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. I'm looking for something along the line of MicroSmith or
WinSMITH, neither of which is any longer available.

Thanks,
Roy Lewallen, W7EL

Additional comment: if you write impedance files in standard network
analyzer format, they can be used by a lot of programs. I believe you
can find fairly detailed descriptions of the .s1p format on the web.
In particular, RFSim99 can read such files and use them in a 1-port
representation. It will even do an automatic L match to an impedance,
and will display S11 on a Smith chart. (But I'm remembering a problem
if you write them in dB format, something about that RFSim99 uses
10^(dB/10) instead of 10^(dB/20) to convert them to linear before it
uses them...)

Cheers,
Tom