Thomas,
"It's complicated..." is a good answer and the more you read, the more
you'll see why. I recommend checking out Chapter 5.3 of Stephen Hall &
Howard Heck's Book Advanced Signal Integrity for High-Speed Digital Designs
[2009]. It does a great intro of different roughness models throughout
history. There's been a ton of research done. It's all over google and
ieeexplore.
Ryan Lott
Spectra7 Microsystems
On Tue, May 10, 2016 at 12:35 PM, Thomas John <thomasjohngt@xxxxxxxxx>
wrote:
Hi folks,
I would like to know if there is any study out there which explains the
correlation between surface roughness and loss at higher frequencies.
Trying to match the S-parameter from VNA measurements with simulated
measurements and I believe playing around with surface roughness should
help me narrow the gap between the two.
If there are papers/articles out there which explain how to best model
surface roughness without have to do the actual cross section of the board,
that will be great.
-Thomas J
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