Re: [SI-LIST] : 20-H Rule for Power Planes

Michael E Vrbanac (mvrbanac@cisco.com)
Tue, 1 Jun 1999 11:57:15 -0700 (PDT)

Actually, the "conductor" referred to in #2 is one that is mainly "in
the field" with the amount of coupling dependent on distance from the
edge (source) and orientation with respect to the field (i.e. meant to
be a generalized statement).

It can include traces/conductors which approach the edge of
the subject PCB.

Michael E. Vrbanac


>
>
>
> Michael E. Vrbanac wrote:
>
>
> >The radiation problem seems to require two necessary conditions:
> >1. a fringing field that is set up between two planes
> >2. a conductor placed in the "near field" to that fringing field
> >which has access to a susceptible circuit or can carry the energy
> >outside the system to "radiate".
>
> Is the conductor in item two mainly a conductor that
> approaches the edge at right angle, going from a region
> of power planes to a region of no power planes such as
> at a connector?
>
>
>
>
>
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