[SI-LIST] Mixed-mode impedance matrix
- From: "Zhou, Xingling \(Mick\)" <xlzhou@xxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Thu, 29 Jun 2006 12:09:13 -0400
Hi,gurus,
I was asked to simulate differential Z. It was obviously motivated by
mixed mode S parameter theory. So strictly speaking, I need to convert
mixed-mode S to Z. I remember somebody asked the same question last
year.
As we know, the mixed-mode S parameter theory is well-establised
(generalized by Andrea Ferrero in 2005). However, I don't know any
mixed mode Z.=20
1. Some engineers do the so-called pure mode conversion, either diff or
common modes. If so, what do we know about the c-d/d-c mode conversion?
Something is missing here? Of course, mathematically you can do it.
2. Is it possible or meaningful to define the mixed-mode Z? We need a
reference impedance to do any S-Z converison, what is it for the d-c
part?
What is the latest development in theory other than some personal
practices? I mean we need a solid foundation to do it. Any literature? I
think if the conversion can be defined, we must convert the whole S into
Z, not piece by piece (so-called pure mode conversion). Otherwise the
information is incomplete?
Thanks,
Mick
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