[SI-LIST] Antwort: Re: 90 degree turn in PCB tracks

Hello,

Following the advices I read the article about 90 degree bends on
ultracad.com as well as the appropriate chapter in Eric Bogatins book.
I am quite surprised about the conclusion that 90 degree corners don't
matter. I remember that once in a simulation of a 50 ohm microstrip-lin=
e
with
a chamfered 90=B0 corner in ADS Momentum, I never got a S11 better than=
 15 dB
at frequencies higher than 15 GHz, even 10 GHz made problems.
The mentioned articles don't consider the frequency respectively just
consider designs where the right-angle bend is electrically smaller tha=
n a
rising edge.
Would be interesting to know how two 45 degree corners behave at higer
frequencies.

Regards, Matthias

____________________________________


___________________________________________________________________
Diese E-Mail enth=E4lt vertrauliche und/oder rechtlich gesch=FCtzte
Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-M=
ail
irrt=FCmlich erhalten haben, informieren Sie bitte sofort den Absender =
und
vernichten Sie diese Mail. Das unerlaubte Kopieren, jegliche anderweiti=
ge
Verwendung sowie die unbefugte Weitergabe dieser Mail ist nicht gestatt=
et.
-----------------------------------------------------------------------=
-------------------------------
This e-mail may contain confidential and/or privileged information. If =
you
are not the intended recipient (or have received this e-mail in error)
please notify the sender immediately and destroy this e-mail. Any
unauthorized copying, disclosure, distribution or otherwise use of the
material or parts thereof is strictly forbidden.
___________________________________________________________________=


------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List FAQ wiki page is located at:
                http://si-list.org/wiki/wiki.pl?Si-List_FAQ

List technical documents are available at:
                http://www.si-list.org

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu

Other related posts: