[SI-LIST] Re: Impedance matching with CPW

HI:
korea is strong in this field. Numerious papers had been published in this 
field by Korea people.
This issue also bugged me for a long while. Ansoft 2D extractor will give rough 
results, the accuracy was testified by a paper by Thomas Lee "Multigiga 
interconnect...".  Some 3D tools such as HFSS will also give you S-matrix, 
which is close to 2D results. These results can be used to build up spice 
circuit.
I have never try any 2.5D tool, would you like to share your experience.
BH
 
 kschoi@xxxxxxxxxx wrote:Dear Experts;

I design CPW pattern for the impedance matching with a given load. I think
that unlike microstrip line,
there is no closed form equation decribing CPW so that the simulator such
as 2.5 D simulator may be only
solution for the impednace matching, which needs much time and know-how.

Is there general rule of thumb in designing the CPW for the purpose descibe
above? I searched reference book
and paper but so far I cannot find it.

Thanks...

Kwang-Seong Choi


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