From: Kai Keskinen ([email protected])
Date: Thu Jun 15 2000 - 10:23:20 PDT
Hi Brian:
There is a program available from GE called W-flux that solves the
parameters for single and coupled microstrip and stripline geometries (2-D).
I know that there are some spreadsheets available from some of the SI list
subscribers that use the simple approximations to give you pretty close
values.
Kai Keskinen
Equipment and Network Interconnect
Nortel Subsystems and Performance Networks (NSPaN)
(613)-765-3506 (ESN 395)
[email protected] <mailto:[email protected]>
-----Original Message-----
From: Moran, Brian P [SMTP:[email protected]]
Sent: Thursday, June 15, 2000 10:56 AM
To: '[email protected]'; [email protected]
Subject: RE: [SI-LIST] : Upper limit of interplane
capacitance
Does anyone out there how to reach Robert Cutler, from Malibu, CA.
He used
to sell a PC based program that solved basic transmission line
impedance and
coupling equations, that I found very useful in what-if analysis.
If your
out there Robert, send me a link.
If anyone else has a suggestion as to a simple tool I would
apprciate it.
Not something like Ansoft. Something very basic for PCB trace
modelling and
single conductor coupling.
Brian P. Moran
Intel Corporation
Platform Design Engineering
[email protected]
(916) 356-1912
-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: Thursday, June 15, 2000 7:23 AM
To: [email protected]
Subject: RE: [SI-LIST] : Upper limit of interplane capacitance
Larry and Erik,
[Erik Daniel wrote]
> I agree with most of your comments on power plane capacitance, but
I have
to
> disagree with one point -- dielectric loss does NOT decrease with
decreased
> thickness of the dielectric -- dielectric loss is independent of
the
> dielectric thickness in particular, and all geometrical concerns
in
general
> (unlike skin-effect loss).
Someone once explained dielectric loss to me as absorption of the
energy
in the E/M field by quantum resonances in the molecules that make up
the
dielectric material. In my mind, I thought this sounded analogous
to the
photoelectric effect, where you shine light of a particular
frequency on
an atom and it gets absorbed if the frequency corresponds to one of
its
quantum states. Is this truly the physical origin of dielectric
loss?
If so, that would explain why it's strictly a material property and
not
geometry-dependent...
Greg Edlund
Advisory Engineer, Critical Net Analysis
IBM
3605 Hwy. 52 N, Dept. HDC
Rochester, MN 55901
[email protected]
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