[SI-LIST] Re: Estimate min TL spacing based on NE/FE noise budget
- From: "Ken Cantrell" <Ken.Cantrell@xxxxxxxxxxxxxxxx>
- To: <lluo3@xxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 15 Nov 2004 08:24:23 -0700
Lei,
I have never found a closed form solution that is even vaguely accurate when
it comes to coupled TLs. They usually fall apart on the odd mode
capacitance (when compared to field solver results). I certainly wouldn't
design with them. I use hand calculations to increase my understanding of
the fundamental concepts of coupling, but nothing more. If anyone on the
list knows of some 10% accurate,no, even 20% accurate formulas when compared
to solver results, I would appreciate links also.
Ken
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of lei luo
Sent: Saturday, November 13, 2004 11:54 PM
To: si-list@xxxxxxxxxxxxx
Cc: lluo3@xxxxxxxx
Subject: [SI-LIST] Estimate min TL spacing based on NE/FE noise budget
Hi, ALL:
I am doing hand calculation to estimate the Xtalk. I have a cross-talk noise
budget (for both backward(Near End) and forward(Far End) noise) and want to
estimate the min space needed between two microstrip lines.
1) Based on the Xtalk noise budget, I estimated the backward crosstalk
coefficient Kb and forward crosstalk coefficent Kf through Vb=Kb*Vm and
Kf*L*Vm/Tr
2) But I don't know how to find the Min Space from the Kf and Kb.
Can someone give me suggestions,relative papers or URL links? Thanks in
advance.
Lei Luo
Research Assistant
ECE, NC State University
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