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    [HFSS] What does N/A mean for delta S?

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    Sometimes the delta S value in HFSS is shown as N/A. What causes this?

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    Re: [HFSS] What does N/A mean for delta S?

    What does N/A mean
    'Not applicable' =usual meaning.



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    Re: [HFSS] What does N/A mean for delta S?

    Quote Originally Posted by Nhera View Post
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    Sometimes the delta S value in HFSS is shown as N/A. What causes this?
    For the first pass at that frequency, there is no previous S-parameter value to compare with, so deltaS cannot be calculate -> not applicable.



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    Re: [HFSS] What does N/A mean for delta S?

    Quote Originally Posted by volker@muehlhaus View Post
    For the first pass at that frequency, there is no previous S-parameter value to compare with, so deltaS cannot be calculate -> not applicable.
    I understand the first pass. But why the 8th pass? What possible reason could there be for delta S to be not calculated



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    Re: [HFSS] What does N/A mean for delta S?

    Quote Originally Posted by Nhera View Post
    I understand the first pass. But why the 8th pass? What possible reason could there be for delta S to be not calculated
    Additional meshing frequency oder additional convergence criteria?



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    Re: [HFSS] What does N/A mean for delta S?

    No. Only the simple delta S criteria, only a single frequency adaptive meshing.



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    Re: [HFSS] What does N/A mean for delta S?

    Quote Originally Posted by Nhera View Post
    No. Only the simple delta S criteria, only a single frequency adaptive meshing.
    I have difficulties to believe that - look at deltaS which jumps back to very large values after the N/A in pass 8.
    I'm not an HFSS user, but I only see that behaviour in other FEM if there is multiple criteria or frequencies for mesh refinement.



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