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Low Frequency Issues with CST MWS

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kowal_edward

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All,

I am simulating a simple microstrip trace in CST. I am using discrete ports and PML (open + add space) boundary conditions. I notice that S12 does not quite reach 0dB at DC, even with PEC models for the conductors and no dielectric loss.

Is there something I should be doing to get S21 -> 0dB?

Thanks
Ed
 

kowal_edward said:
All,

I am simulating a simple microstrip trace in CST. I am using discrete ports and PML (open + add space) boundary conditions. I notice that S12 does not quite reach 0dB at DC, even with PEC models for the conductors and no dielectric loss.

Is there something I should be doing to get S21 -> 0dB?

Thanks
Ed
Click to expand...

Do you have Line Impedance Adaptation turned on? Do you have Inhomogenous Port Correction turned on? Both are in the solver settings... forgot the exact names...
 

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