Multiple lumped ports with excitation

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I want to simulate a chip with 4 independent CPW resonators, each having an input and output lumped port at the end of the respective resonators to calculate the two-port transmission S-parameters. I add "EMW - Frequency Domain" Study and add total 8 lumped ports (4 pairs with excitation ON and OFF) and compute. I expect getting S-parameters in the Results but I don't get it and instead all I can get is "Reflection coefficient with multiple excitation" only for 4 ports which had excitation ON. How can I get S-parameters for 4 CPW like, (S00, S10, S01, S11), (S22, S32, S23, S33), etc.?


1 Reply Last Post 05.12.2025, 08:28 GMT-5

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Posted: 53 minutes ago 05.12.2025, 08:28 GMT-5

Hi,

For sparameter sweep you do not need to set lumped ports with on/off. What you need to do is under emw node add a check mark to use manual port sweep and the add in a parametric sweep. If you have eight ports then the parametric sweep should be 1 2 3 .... 8. Perhaps it is worthwhile to start simple with just a two port sweep for a simple object. There are example files on comsol website that show this.

Hi, For sparameter sweep you do not need to set lumped ports with on/off. What you need to do is under emw node add a check mark to use manual port sweep and the add in a parametric sweep. If you have eight ports then the parametric sweep should be 1 2 3 .... 8. Perhaps it is worthwhile to start simple with just a two port sweep for a simple object. There are example files on comsol website that show this.

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