[SI-LIST] Re: EMI and Susceptibility Modeling and Analysis Tools
- From: "DAVID CUTHBERT" <telegrapher9@xxxxxxxxx>
- To: "Steve Waldstein" <swldstn@xxxxxxxxxxxx>
- Date: Mon, 5 May 2008 08:38:21 -0600
Steve,
due to my former managment not wanting to invest the money for proper
simulation software I learned how to use NEC-2 to model these EMI items.
NEC-2 costs from 0 to $150.
The dominant IC "antenna" was found to be the package operating as a number
of electrically short loop antennas. The radiation of microstrip can also be
modeled with NEC-2. Connector and module EMI can really be a problem.
Connectors can radiate as loop antennas but where they seem to really cause
problems is when they excite a module or a cable (with common-mode current)
as a monopole or as half of a dipole antenna. This is easily modeled with
NEC-2.
With some practice all of this becomes quite visible and a look at a system
will reveal the potential 'antennas.' Then it is a matter of making the
'antennas' less effective, the antenna excitation devices (connectors) less
effective, or reducing the antenna current.
Dave Cuthbert
NARTE Certified EMC Engineer
Focused Test, Inc.
On Sat, May 3, 2008 at 8:41 AM, Steve Waldstein <swldstn@xxxxxxxxxxxx>
wrote:
> To all,
>
>
> I've entered a new area and I'm looking for tools that can help model the
> EMI emissions and EMI susceptibility of chip-to-chip and module-to-module
> interconnects. I'm not very familiar with the tools and modeling
> capability
> (accuracy) in this area. I'd appreciate any recommendations or guidance
> people might have.
>
>
>
> Steve
>
> __________________________________
>
> Steve Waldstein
>
> E-mail: swldstn@xxxxxxxxx
>
> Mobile: (207) 749-6260
>
> Home: (207) 885-0594
>
>
>
>
>
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