Home Forums Bug Reports Markers while using a Smith Chart

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  • #579
    MiOh
    Participant

    The markers when using a Smith chart are showing polar coordinates, not the actual S-parameter.

    The center of Smith Chart is 1 ohm (if normalized) or 50 ohms if using 50 ohm ports (not normalized. The left side is 0 ohms and the right side is infinity.

    When using the markers, the center shows zero, the left shows minus one and the right shows plus one. These are normalized polar coordinates.

    MiOh

    #746
    wb6yaz
    Participant

    Plotting s-parameter data with a table also shows this error when using real / imaginary setting.

    #843
    QucsStudio
    Keymaster

    The data in the smith chart is correct. Of course, the markers show the values of the s-parameters and not the corresponding impedances. Therefore the numbers.

    Please use the function rtoz(…) to transform reflection coefficient (e.g. S11) to impedance.

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