[SI-LIST] : GND on the outer layers

Jon Keeble (j.keeble@fairlightesp.com.au)
Wed, 14 Jul 1999 12:40:05 +1000

I'd be interested in opinions on whether placing tracks "inside" and
putting GND planes on the outer layers reduces raditation.

It seems to me that there is little difference regarding the high
frequency magnetic component: the return current in an outer plane runs
parallel with the track, and the materials have little effect on the
field.

The E field is different in that the conductivity of the outer GND
planes would confine this component completely within the PCB.

Has anybody modelled this?

Jon Keeble.

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