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I have done an sp-analysis an plotted the result in a smith chart. For
clarity and help, I would like to include VSWR-circles, but don't know how.
Does anyone else?
BR
Peter S
--Peter:
Results->Direct Plot->SP->VSWR
---
Erik
"Peter Sjöblom" <peter.sjoblom@gigaant.com> wrote in message news:<ZDWec.89625$dP1.267846@newsc.telia.net>...
I have done an sp-analysis an plotted the result in a smith chart. For
clarity and help, I would like to include VSWR-circles, but don't know how.
Does anyone else?
BR
Peter S
I don't know if cadence can do it, but the OP was probablyPeter, Erik,
Whilst you can plot VSWR, you can't plot it on a Smith Chart.
VSWRi is defined as:
1+|Sii|
--------
1-|Sii|
where i is a port number. So it's a scalar value versus frequency - not complex,
and so can't be plotted on a smith chart.
Regards,
Andrew.
--On Wed, 14 Apr 2004 10:09:37 +0100, Andrew Beckett wrote:
Peter, Erik,
Whilst you can plot VSWR, you can't plot it on a Smith Chart.
VSWRi is defined as:
1+|Sii|
--------
1-|Sii|
where i is a port number. So it's a scalar value versus frequency - not complex,
and so can't be plotted on a smith chart.
Regards,
Andrew.
I don't know if cadence can do it, but the OP was probably
interested in plotting constant VSWR circles on the smith
chart. Another way to describe it is the locus of points
( Sii) that provide a constant VSWR. Just a guess.
Mark
I understand. I don't think this can be done right now - Peter, you should
contact customer support using your normal channel and ask for this as an
enhancement request - sounds doable.
Andrew.
On Wed, 14 Apr 2004 23:23:54 -0400, Mark Valery <mevalery@attbi.com
wrote:
On Wed, 14 Apr 2004 10:09:37 +0100, Andrew Beckett wrote:
Peter, Erik,
Whilst you can plot VSWR, you can't plot it on a Smith Chart.
VSWRi is defined as:
1+|Sii|
--------
1-|Sii|
where i is a port number. So it's a scalar value versus frequency - not
complex,
and so can't be plotted on a smith chart.
Regards,
Andrew.
I don't know if cadence can do it, but the OP was probably
interested in plotting constant VSWR circles on the smith
chart. Another way to describe it is the locus of points
( Sii) that provide a constant VSWR. Just a guess.
Mark
--
Andrew Beckett
Senior Technical Leader
Custom IC Solutions
Cadence Design Systems Ltd