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From [log in to unmask] Wed Jun 5 11: |
23:57 1996 |
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Yahhhh. High Speed Digital. Some sort of parallel processor thing that
runs at a Ghz. He wants to do the isolated Coaxial thing without
coplanar waveguide. He wants to produce a ground via barrier that
separates digital from control. (Probably on advanced <cleaner than
normal> materials)
Groovster
______________________________ Reply Separator _________________________________
Subject: Re: FAB: RFI/EMI Vias
Author: [log in to unmask] at SMTPLINK-HADCO
Date: 5/23/96 7:44 PM
Groove man,
I would first ask: Does the customer want controlled
impedences on the board? (I'm assuming they do...)
Doug
______________________________ Reply Separator _________________________________
Subject: FAB: RFI/EMI Vias
Author: [log in to unmask] at internet-mail
Date: 5/23/96 5:46 PM
I have a customer who has asked me if I know about shielding vias.
I don't know much about these. All I know is that the size of the PTH
and the distance apart are based, somehow, on what frequency the
logic (PCB) is operating at. (Yessss?)
Now I don't have IEEE text books anywhere near this facility.
I'm a simple fabricator. Can someone who's savvy with RF <or even
Microwave> design give me some pointers to what kind of formulas are
used to determine this shield via barrier technique.
Thanks in advance for any and all replies.
Groovy
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