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HFSS MULTI MODE WAVEGUIDE PORT

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kato01

kato01

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Hello, I am trying to define a port for a quad-ridge waveguide. the eigenmode solution indicates that for the band of operation I am running, there are 8 modes that are excited at various frequencies inside the sweep.
Not sure how to define the the port so I won't have convergent problems on one side and avoid the warnings of higher modes supported on the other hand.
not sure which option is best in the waveguide port definition and what are the integration paths possible.

Thank you
 

Hello kato, when modeling a waveguide port I like to start off by adding 5 modes to port and then just performing a quick 'solve ports only' simulation. You can plot the im(Gamma) over frequency and see when certain modes come alive in your band. If all of them start propagating at some point in your operating band then add more modes until you have at least one mode that remains evanescent. Once you have enough modes assigned to your port you can simulate your structure.

The integration paths are not always necessary for your simulation. I used them when I need to keep the polarization consistent between ports or if I'm working in circular polarization.
 

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    Azulykit

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