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Re: Has anyone got code for a Smith Chart?

• To: mathgroup at smc.vnet.net
• Subject: [mg129419] Re: Has anyone got code for a Smith Chart?
• From: "djmpark" <djmpark at comcast.net>
• Date: Fri, 11 Jan 2013 22:27:24 -0500 (EST)
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The Complex Graphics routines in the Presentations Application contain
routines that make it quite easy to draw Smith Charts and plot impedence
curves on them.

I have posted an example at Peter Lindsay's web site at the Mathematics
department at St. Andrews University. It should appear within a few days. It
has a Mathematica notebook and a PDF file.

http://www.st-andrews.ac.uk/~pl10/c/djmpark/ 


David Park
djmpark at comcast.net 
http://home.comcast.net/~djmpark/index.html 




From: David Kirkby [mailto:drkirkby at gmail.com] 

I'm looking to plot data colected via an experiement on a Smith Chart. Does
anyone have code for one, which will save me the not-inconserable effort of
writing one? 

There is one in the Wolfram archive
http://library.wolfram.com/infocenter/Demos/441/
but that is written for a very old version of Mathematica, and it appears
unable to plot experimental data.

There is also a Smith Chart on the Wolfram Demonstrations project

http://demonstrations.wolfram.com/TheSmithChart/

but that one has a serious flaw. If one puts R=50 Ohms, C=0, L=0, then the
point should be in the middle of the Smith chart, not to the far right hand
side. It must be the most obvious point to plot on a Smith chart, but it
fails. 

Dave