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  1. #1
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    HFSS Multimode Port definition

    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?

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  2. #2
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    Re: HFSS Multimode Port definition

    Hi kato01 ,,

    Quote Originally Posted by kato01 View Post
    How o define a multimode port when you don't know which modes are excited?
    Solve for a sufficiently large number of modes.

    Quote Originally Posted by kato01 View Post
    I have no idea how to define the line of integrations for each of them.
    Integration lines are not required for driven-modal waveports.

    Quote Originally Posted by kato01 View Post
    Also how HFSS deals with undercut-off modes?
    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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