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Dual directional coupler and passivity

Question asked by divitha on Aug 9, 2006
Latest reply on Aug 29, 2006 by dleiss
Hi all!

I'm having a warning from ADS when simulating a dual directional coupler: "warning detected by hepeesofsim during SP analysis. Linear S_Port 'Coup1.cmp2' is non passive".

I'm using manufacturer's data for the coupler and the warning is the same for an envelope analysis or S parameter analysis.

Any help will be appreciated.