FreeLists / si-list / [SI-LIST] Re: Too much predicted loss

["Kai Keskinen" <kalevi@xxxxxxxxxx>]

Have you got the right loss tangent value?

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of You, Yang
Sent: Tuesday, July 12, 2005 12:10 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Too much predicted loss


Hi,
            I'm working with the SIWave software on a board with some
test traces but the results of the simulation indicate about 8 db more
loss than is actually seen in the lab on the actual board. I imported
the board directly from the layout tool and setup the stackup but I
think the dielectric layers I specified might be a little thinner than
on the actual board. Would that cause more loss to show up in the
s-parameters? What other factors might be contributing to this? Thanks
for your help.

 

Yang You

 

Texas Instruments, Inc.


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