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Frequency Offset in S-Parameters

Question asked by WDOERR on Aug 23, 2007
Latest reply on Aug 24, 2007 by wrivas

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Hallo,

I use S-parameter files and would like to use a frequency offset.

The purpose is to shift the frequency in order to implement a temperature effect or production spread.
The application is a SAW filter whose main variation is in frequency.

Any ideas are welcome.

In past I modified the frequency values in the file by using Excel. But that is onyl efficient for a single event.

Kind Regards,
Wolfgang

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wrivas Aug 24, 2007 1:26 AM
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The one idea that comes to mind is to use a DAC (Data Access Components) instead of the SNP to read the touchstone files. You can then create a variable expression that takes the simulation frequency and "converts" it to the frequency in the file so that the iVal of the DAC picks the desired frequency from the file. You then use expressions that take the s-parameters from the file and assign them to a S2P_Eqn component.
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Frequency Offset in S-Parameters

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