Ron,

AMPs are still AMPS and of course at RF frequencies, skin effect dominates.
Unless you are designing a high power circuit, I can't imagine that the
difference is measurable.  I iwould think that the width of the traces is much
more critical (as is distance from ground plane through the board) as that
effects capacitance and capacitive reactance and ultimately impedance.
Capacitance should dominate over the resistive term UNLESS the trace width is so
narrow that the RF resistance (skin effect) is raised.  Do you have software or
nomograms to assist you?  I'm sure they exist to design traces and PCBs for a
broad range of frequencies.

This is not something you want to guess at (or leave it to answers from a
forum).

Bob Landman
H&L


----- Original Message -----
From: Ron Luman <[log in to unmask]>
To: <[log in to unmask]>
Sent: September 27, 1999 1:40 PM
Subject: [DC] more RF ?


> Is there a significant change in the boards impedance characteristic from 1
> oz copper to 2 oz copper to effect RF circuits from 215 to 230 MHz.
> When I plug 1 oz to 2 oz copper in my calculations I only get about 1/2 ohm
> of impedance difference.
>
> Ronny Luman C.I.D.
> SERCEL INC.
> (918) 621-5725
> [log in to unmask]
>