[SI-LIST] Re: Gigabit traces on Backplane
- From: steve weir <weirsi@xxxxxxxxxx>
- To: jain.nitin@xxxxxxxxx, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 08 Dec 2005 01:06:11 -0800
Nitin, FYI attachments don't generally make it to postings. Variation in
channel geometry does cause impedance variations. Whether it is enough to
be a problem or not depends on a number of other factors.
Steve.
At 02:12 PM 12/8/2005 +0530, jain.nitin@xxxxxxxxx wrote:
>=0D
>Hello,
>
>Enclosed is the snapshot of Gigabit traces (differential) running on the
>Backplane in my design. The Blue color shows the traces in one signal
>layer and green color shows the ground plane.=0D
>
>Now if you look closely, you will find that at some places, the plane is
>not there for the differential trace because of the Antipads. Although
>this for a short segment only.
>
>Could somebody let me know if this is okay or any problems are expected
>because of this. Will this cause any impedance discontinuity.
>
>With regards,
>Nitin Jain
>
>
>
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