[SOLVED] How to find the cut off frequency in HFSS output variables?

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kiennt.k54

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Hi all,

I am designing an FSS for a bandstop filter. I want to find out the cut off frequency of S21 parameter in HFSS.
Could you please help me to know how to identify the cut off frequency in HFSS output variables?
I have try if(S(2,1)=<value>,true_exp, false_exp) expression, but it throws error that: expect mathematical operator while parsing this expression. Instead found this symbol "=".
 

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