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    Thanks for the interesting web.

    >Higher mode effects.
    I don’t know much about it, but I think it is possible.

    For example.
    When there are dk1 and df0
    there is no difference between the waveforms of port50Ω/line50Ω and port51Ω/line51Ω.

    When dk4.3 and df0.021 (FR-4)
    There is a difference in waveform shape between port50Ω/line50Ω and port51Ω/line51Ω.

    *What is noteworthy is not the value but the waveform.

    When port impedance and line impedance match, the waveform is collapsed.

    QUCSSTUDIO/CST has the same behavior.
    SONNET/Hyperlynx behaves differently than QUCSSTUDIO/CST.

    I do not know what is the correct behavior, but can I assume that QUCSSTUDIO is correct?



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