How do you model a 2-Port VNA measurement with Microcap.

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#1 21657975 16 Apr 2011 00:10

Bob Casiano Bob Casiano

Anonymous
Post #1
21657975 16 Apr 2011 00:10

I want to model a two port VNA measurement of an RLC circuit. I'm using Spectrum MicroCap10 demo to model it. But, I'm just not sure I have it setup correctly. Can someone give me a little guidance on the best way to do a 2port measurement in MicroCap?

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#2 21657976 16 Apr 2011 09:28

Cody Miller Cody Miller

Anonymous

Post #2
21657976 16 Apr 2011 09:28

I am still thinking about your question. The model should represent a particular mode of operation. Like S11 or S12. In the case of S12 a signal is sent out of port 2 and measured on port 1 (I may have that backwards) but in a case like this the model of port 1 (receiving) may be different than port 2 (source).
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#3 21657977 16 Apr 2011 11:21

Cody Miller Cody Miller

Anonymous

Post #3
21657977 16 Apr 2011 11:21

Here is a S12 model.. On a separate note I would think that you might want to get rid of the Large_R. You might intend that to be a parallel R instead of series with the 50 ohm.
#4 21657978 17 Apr 2011 10:40

Bob Casiano Bob Casiano

Anonymous

Post #4
21657978 17 Apr 2011 10:40

Thank you for the comments. As far as the Large_R, I think I was having an issue with Microcap doing an analysis with the two ports connected directly. It didn't error when I put the large_R's in.
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How do you model a 2-Port VNA measurement with Microcap.

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