[SI-LIST] Re: Discontinuities on PCB
- From: "ariazi" <ariazi@xxxxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Thu, 12 May 2005 12:53:02 -0700
Dear Charles,
Recently, I read a Master's Thesis (document available on line) authored
by David W. Frame, entitled " Printed Circuit Board and Connector Impedance
Matching Using Complex Conjugation".
It considers two impedance matching techniques for PCB connectors:
1. The "Pot Hole" method.
2. The complex conjugation technique.
It concludes that the simpler "Pot Hole' approach proves sufficient.
I thought this document may be useful to you, because it analyzes such
PCB discontinuities both mathematically and also via HSPICE simulations.
Best Regards,
Abe Riazi
serverWorks
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Charles Harrington
Sent: Thursday, May 12, 2005 11:49 AM
To: Mark_Burford@xxxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Discontinuities on PCB
Hello Mark,
because Eric's book is so beautifully written, I've
gone through it almost twice already. However, it has
very little or nothing to do with my question. I also
went through Johnson's book (Advanced Black Magic),
Silvester and Benedek's publications on discontinuties
and quite a lot of other electromagnetic texts. So,
it's not a question for beginners.
Jose recommended me Gupta's book (thanks Jose), which
I already read. Here, Wolf and Mehran's waveguide
model are used to analyze T-bends, Gap and other discontinuities, but the
questions on how far the excited modes go away from the discontinuity and
how this depend on the frequency are not dealt with.
As far as I know, this subject has not being properly
dealt with yet.
So may the gurus recommend any other publications on
this subject or some advice.
Thanks,
Charles
--- Mark Burford <Mark_Burford@xxxxxxxxxxx> wrote:
> Suggest you start with Eric Bogatin's book 'Signal
> Integrity Made Easy'
> like I did (also a post graduate) then save the
> questions you have after
> reading the book for these guru's of the signal
> integrity world. It is
> an excellent book and a good read also.
>
> Anyone else go to the Cadence seminar Tuesday that I
> didn't get to meet?
>
> I was the younger looking of you 'seasoned'
> experts!! ;o)
>
> Hope this helps
> Mark
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of Charles Harrington
> Sent: 12 May 2005 11:36
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Discontinuities on PCB
>
> Hello,
>
> When a TEM (or quasi-TEM) signal propagating on a
> microstrip trace meets a discontinuity (e.g., a via)
> on a substrate at microwave frequencies,
> higher-order
> modes are excited at the discontinuity, leading to reflections.
>
> Can anyone tell me exactly what kind of modes are
> excited and why they are excited. How far away from
> the discontinuity can they propagate and how does
> this
> depend on the operating frequency.
>
> I'm a postgraduate student currently working on=20 discontinuities on
> PCB. My search for relevant literature led me to this list. So, I'll
> appreciate any
> help.=20
>
> Charles.
>
>
> =09
> Yahoo! Mail
> Stay connected, organized, and protected. Take the
> tour:
> http://tour.mail.yahoo.com/mailtour.html
>
>
------------------------------------------------------------------
> 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:
> //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: =20
> //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
> =20
>
>
------------------------------------------------------------------
> 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:
> //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:
> //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
>
>
>
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
------------------------------------------------------------------
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:
//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:
//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
------------------------------------------------------------------
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:
//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:
//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:
