Sergio,
Just break them up into two sets of dual striplines.
L1 ========
^ ^
L2 == |
L3 | ==
| |
L4 | ==
L5 == |
v v
L6 ========
Don't forget to include the absent trace thicknesses into the
dielectric calculations.
Now I hope the designer has laid out the traces on each layer to be
different
directions so the cross overs provide a minimal amount of crosstalk (Xtalk).
Like one layer North and South, another east and west, and the other two 45
degrees of each other.
Good luck,
David Hoover
http://home.earthlink.net/~dhoovy
----- Original Message -----
From: "Sergio T. Ruiz" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, November 17, 2003 9:18 AM
Subject: [TN] more controlled impedance..
> i have another controlled impedance question that is baffling me..
>
> of all the jobs that we have run, the configuration we have used has
always
> been a textbook situation including striplines, dual striplines, embedded
> microstrips, and the like..
>
> now, i have one that i am looking at that doesn't look like anything i
have
> ever seen..
>
> just as in the dual stripline model, there are traces embedded between
> ground planes, but in this case, there are four sets of traces embedded
> between the two planes..
>
> does anyone have any ideas on how to handle this model?
>
> thanks!
>
>
> ____
> Sergio T. Ruiz
> technology and MIS
> Philway Products, Inc.
> (419) 281-7777 x232
>
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