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  1. #1
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    Even and odd mode impedance in HFSS 11

    Seems the HFSS 11 or 12 has some changes in result report.

    In HFSS 10 or ealier version, I see the method to extract the even and odd mode impedances of couple-line as follows in the previous post.
    (1) Choosing the driven terminal (not driven modal);
    (2) draw two terminal lines when setting the waveports;
    (3) after simulation, you can get the differential impedance Zdiff and common impedance Zcomm. Then the even mode impedance Zeven = 2*Zcomm, the odd mode impedance Zodd = 0.5*Zdiff.

    How about HFSS 11 or 12, does anyone have some idea?

    Now I use driven modal, and set number of modes to 2, and get two different impedances. Are they the even/odd impedances I need?

    Also, I find that in driven_terminal solution mode, we can set four terminals for a coupled line.

    thx!

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  2. #2
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    cannibol_90's Avatar
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    Re: Even and odd mode impedance in HFSS 11

    Hi,

    I too have the same doubt as yours; does 2 modes give even and odd mode impedance values for a wave port excitation?



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