[SI-LIST] Re: plane RLGC Debye model

Istvan what data do you have?  Do you have measurements from material 
samples? 

For most power work, it is sufficient to use a single value for tangent 
loss.  If you get the other parameters correct, then the models will 
tend to show slightly higher peak impedances at the modal resonances 
than measurements out above 1GHz, but the difference is typically not great.

Steve.
Istvan Nagy wrote:
> hi 
> how can i calculate the Ri, Li, Gi, Ci parameters for a frequency dependent 
> unit-cell Debye RLGC model for a power/gnd plane pair? 1st order or up to 3rd 
> order Debye model would be good. 
> are there any equations? 
> (Debye models introduce additional RL and GC elements into the 4 element 
> original RLGC model to reflect the frequency-dependency, and with staying 
> with basic circuit elements, suitable for spice)
>
> i would like to make frequency dependednt spice 3f5 models (not w-element 
> model, since its not compatible with most of the spices) from arbitrary power 
> planes, with lumped-element grid. 
> I found application notes where in the examples they just shown the 
> calculated values, without describing the calculation.
>
> regards,
> Istvan Nagy
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