[SI-LIST] Re: characteric impedance
- From: "O. Laney" <olaney@xxxxxxxxx>
- To: tonywai34@xxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Tue, 04 Dec 2012 12:59:59 +0000
Perform an S to Z parameter conversion. You'll need to know Zo for your
measuring instrument. Then for your specimen Zin =
Z11-(Z12*Z21)/(Z22+Zload).
See http://en.wikipedia.org/wiki/Impedance_parameters#Two_port for the
conversion math
This can also be done in Matlab:
http://www.mathworks.com/help/rf/s2z.html especially recommended for
ports > 2.
See http://www.ece.rutgers.edu/~orfanidi/ewa/ch13.pdf for a general
walk through of the math, and of course RFcafe should be in your
bookmarks.
Orin Laney
------ Original Message ------
From: "Zhang Tony" <tonywai34@xxxxxxxxx>
To: si-list@xxxxxxxxxxxxx
Sent: 12/4/2012 4:23:30 AM
Subject: [SI-LIST] characteric impedance
>Hi
>If I got a s-parameter file, how can I calculate its characteric
>impedance at some frequency range?
>is there any tools can help on this?
>thanks
>tony
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