[SI-LIST] Re: Skin Effect Calculation
- From: Bi Han <mike_bihan@xxxxxxxxxxxx>
- To: Pat_Diao@xxxxxxxx
- Date: Thu, 6 Mar 2003 08:47:57 +0800 (CST)
Hi, Pat:
The intrinsic reason of the skin depth is that the EM field dumps during
penetrating the metal. So, we may calculate the depth in this way:
1. Calculate the skin depth of first layer, then calculate how much did EM
field attenuate after it pass through the first layer.
2. Then calculate that how much can the EM field go deep into the second
layer, it depends on that the field attenuate to the same level as ingorable.
thanks
Bi,Han
Pat Diao <Pat_Diao@xxxxxxxx> wrote:
It sounds like an old and well estabilished subject on skin depth
calculation. But here is what happening....
Consider a copper wire with 10 mils in diameter. If the wire is surrounded
by a layer of, say 1 mil thick, of cover material which has a conductivity
between conductor and non-conductor, therefore at certain frequency the
current is partly in the cover material and partly in the Cu (Two extremes
cases are the cover is of plastics and Cu). Any thoughts on an analytical
solution in skin depth calculation ?
Rgds,
Pat
Pat Diao
ASAT Inc.
Fremont, CA
phone: (510) 249-1227
pat_diao@xxxxxxxx
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