S21 in Smith-Chart ? - RF Cafe Forums

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Smithie
Post subject: S21 in Smith-Chart ?
Unread postPosted: Fri Jul 08, 2005 5:24 am

Hello,

does it make sense to visualize S21 in a Smith-Chart ? What would be your reference impedance ?

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Guest
Post subject:
Unread postPosted: Fri Jul 08, 2005 7:49 am

Not really.. If there is gain you wont see anything unless you have an expanded smith chart. If you want a visual aid for S21, a polar chart is the way to go.

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Jeanalmira
Post subject:
Unread postPosted: Mon Jul 11, 2005 3:39 am
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Joined: Tue Mar 15, 2005 11:43 pm
Posts: 65
Location: Singapore
Hi :

Yes, I agree with the previous post.
just want to add that, smith chart is limited to Magnitude 1. While at most cases, |S21| >1.
That's why, it can't be seen in the smith chart unless you expand it.

Regards,
Jean

Posted 11/12/2012

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