<snip>
However, some clever contributor to this group has provided a means to
plot the graticule of a Smth chart and impedance curves with frequency markers
(Files > Examples > Apps > SmithLTspice.zip).
??
With respect to LTspice handling s-parameters, it certainly can. The .NET
command computes network parameters in an AC sweep. The HELP files says in part,
??
"This statement is used with a small signal(.AC) analysis to compute the input
and output admittance, impedance, Y-parameters, Z-parameters, H-parameters, and
S-parameters of a 2-port network. It can also be used to compute the input
admittance and impedance of a 1-port network. This must be used with a .AC
statement, which determines the frequency sweep of the network analysis."
??
There is an entire section in the tutorial section of this groups files devoted
to s-parameters in LTspice (Files> Tut> S-Parameter).
??
All the best,
??
???? - Philip
Hello Philip,
Thanks for the info.
I'm aware of the Smith chart add-on, which is why I said native. It's clever as you said, but not slick enough for serious design work; even the author concedes it's crude.
</snip>
Other folk might like to be aware that also exist several ways of plotting Smith charts in Excel by using similar kludges. This is one of several:
Regards,
Tony
