[SI-LIST] Re: Right Angle Bends
- From: "Moreira, Jose" <jose.moreira@xxxxxxxxxx>
- To: Lee Ritchey <leeritchey@xxxxxxxxxxxxx>, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Fri, 15 Jul 2011 16:48:37 +0000
From my experience (I also get that statement from my customers) it comes from
the thinking that on a right angle bend the signal would "see" a larger trace
width when crossing "the bend" and because of this different trace width it
will have a different impedance at that point so there is a discontinuity that
is bad for the signal.
I remember an old conference paper showing no measureable effects to 10 Ghz but
I cannot find it again.
I would be interested if anyone know of a good up to date reference (with
measurements) that I can also send to my customers when they have the same
statement.
Jose
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Lee Ritchey
Sent: Friday, July 15, 2011 6:33 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Right Angle Bends
Does anyone know the origin of the myth that right angle bends cause signal
integrity problems?
I though this myth had died a long time ago, but had a conversation last week
with a well known fabricator who was told by a customer that right angle bends
were a no no.
This was a customer who should know better.
Lee Ritchey
Speeding Edge
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