FreeLists / si-list / [SI-LIST] Re: Microstrip Trace under Nickel

[steve weir <weirsi@xxxxxxxxxx>]

Ryan the Telegrapher's equations still hold.  Provided the material 
does not saturate,  ignoring fringing for a rectangular section: L= 
u0*uR*H/X  UMR has a web calculator that if I recall correctly allows 
you to input uR.

So, for a uR of 600 and no saturation, the inductance would go up by 
600X and the impedance by about 24-25X.  You can see that it doesn't 
take much nickel to really throw things off.

Steve.
At 07:53 AM 5/10/2006, ryansatrom wrote:
>Aubrey-
>
>I am well aware of the definition of permeability.  However, i'm
>struggling with this relationship.  For example:
>
>Capacitance increases proportionally to dielectric contstant
>(permittivity).
>
>So if permeability does the same to inductance as permittivity does to
>capacitance, then then inductance of a signal-return path made purely
>of nickel (no plating, used strictly for example) has 600 times the
>inductance of the same signal-return path made from gold?
>
>Are you saying that is true?
>
>
>
>
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