[SI-LIST] Re: Traces don't cause EMI - really?
- From: "Nagel, Michael" <Michael.Nagel@xxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 2 Feb 2004 07:59:53 +0100
Lee,
Sorry, I have to throw this in.
> -----Original Message-----
> From: Lee Ritchey [mailto:leeritchey@xxxxxxxxxxxxx]
> Sent: Sunday, February 01, 2004 6:27 PM
> To: Ken Hayden; Charles Grasso
> Cc: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Traces don't cause EMI - really?
>
>
> Wow! This topic keeps coming up. Wasn't so long ago that we
> had a very
> long exchange where proponents of this notion provided the
> research papers
> that supported it. I got copies of all of them and looked for some
> objective measurement of the EMI caused by a trace routed on
> an outer layer
> over a plane and then moved below the plane.
Could you tell the same thing in the face of somebody who designs
microstrip antennas (not myself, but there are several people around...)?
When there is a radiation mechanism, you will find intentional (as
for the antennas) and unintentional (as for EMI) radiation.
Maybe this tis worth reading:
http://tinyurl.com/rqip
You will find similar patterns in layouts which were done disregarding
techniques to avoid radiated emission.
As Mike pointed out correctly, it is a matter of layout.
[rest snipped]
Best regards,
Michael
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