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HFSS Multimode Port definition

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kato01

kato01

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How o define a multimode port when you don't know which modes are excited?
For example I have a simple waveguide step where the input part is single mode and the other part can support a large number of modes. I have no idea how to define the line of integrations for each of them. Also how HFSS deals with undercut-off modes?
 

Hi kato01 ,,

kato01 said:
How o define a multimode port when you don't know which modes are excited?
Click to expand...

Solve for a sufficiently large number of modes.

kato01 said:
I have no idea how to define the line of integrations for each of them.
Click to expand...

Integration lines are not required for driven-modal waveports.

kato01 said:
Also how HFSS deals with undercut-off modes?
Click to expand...

Properly. Generally, you will only be able to excite them or view their scattering parameters if they are above cutoff at the port.
 

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