Re: [SI-LIST] : skin effect

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From: Barry Ma ([email protected])
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" <[email protected]>, 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.


  -----Original Message-----
  From: [email protected]
[mailto:[email protected]]On Behalf Of Muhammad S. Sagarwala
  Sent: Thursday, August 31, 2000 9:45 AM
  To: [email protected]
  Subject: [SI-LIST] : skin effect

  Hello Si Gurus,

  I just had an interesting discussion with my boss on "skin effect on pcb
  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...


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

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

Best Regards,
Barry Ma <[email protected]>
Morgan Hill, CA 95037
Tel. 408-778-2000 x 4465

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