Re: [SI-LIST] : skin effect

About this list Date view Thread view Subject view Author view

From: Barry Ma (barry_ma@altavista.com)
Date: Thu Aug 31 2000 - 10:53:14 PDT


Brian and Muhammad,

Here is my 2 cents.
Another factor I'd like to consider is the H-field at the conductor surface. If the width dimension of the trace supports much stronger H-field than the height direction, we should increase the width dimension first ....

Barry Ma
Anritsu Company

----------------
From: "Baikuan Wang" <wangbk@sigrity.com>, on 8/31/00 10:19 AM:

Hi, Muhammad,

Skin effect means that most of the current flows along the surface of the conductor.
In this way, the effecient area current goes through is more dependent on
the perimeter rather than the real area (Height x Width). Therefore, inreasing width is more effecient that increasing height in view of reducing the resistance of traces.

Regards.

Brian
  -----Original Message-----
  From: owner-si-list@silab.eng.sun.com
[mailto:owner-si-list@silab.eng.sun.com]On Behalf Of Muhammad S. Sagarwala
  Sent: Thursday, August 31, 2000 9:45 AM
  To: si-list@silab.eng.sun.com
  Subject: [SI-LIST] : skin effect

  Hello Si Gurus,

  I just had an interesting discussion with my boss on "skin effect on pcb
traces".
  I was of the opinion that increasing the trace thickness from 1/2 oz. to 1oz. would help reduce the skin effect but according to him skin effect does not reduce significantly
with the increase in trace thickness.
  He was of the opinion ( and also had some data to back him up) that skin
effect is more dependent on the width of the trace.

  I always thought that if one increases the overall perimeter of the pcb trace - regardless of whether it is done by increasing the width or increasing the thickness - the skin effect would reduce. I would appreciate if somebody could come up with a better explanation...

  Muhammad

  p.s.: when we talked about pcb traces we were talking about striplines in
particular...

  Muhammad S. Sagarwala
  Design Engineer
  Schlumberger SABER
  Ph. (408) 586 7065
  Fax (408) 586 4668

Thanks.
Best Regards,
Barry Ma <bma@anritsu.com>
ANRITSU www.anritsu.com
Morgan Hill, CA 95037
Tel. 408-778-2000 x 4465
_______________________________________________________________________

Free Unlimited Internet Access! Try it now!
http://www.zdnet.com/downloads/altavista/index.html

_______________________________________________________________________

**** To unsubscribe from si-list or si-list-digest: send e-mail to
majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Tue May 08 2001 - 14:29:24 PDT