[SI-LIST] Re: Does power/ground pair edege radiation noise really matter in the EMI test?
- From: steve weir <weirsi@xxxxxxxxxx>
- To: liuluping 41830 <liuluping@xxxxxxxxxx>
- Date: Thu, 23 Dec 2010 04:37:27 -0800
Energy may couple into cables and box apertures. Incident and reflected
energy also finds its way to Z axis penetrations that extend outside any
natural shielding of plane cavities.
Steve.
liuluping 41830 wrote:
> Dear all:
>
> The PDN noise voltages at the edges of a PCB are potential
> electromagnetic interference sources,the noise may be produced by SSN or
> cavity resonance. Many paper ,such as EBG technology,based on this
> suppose,but does this noise really matter in a typical digital board which
> include many high speed memory and serdes ?Does any test analysis that the
> plane edge noise account for how many percent in the total radiation noise ?
>
> Thanks and regards,
>
> LIU Luping
>
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