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 hbsp convergence issue 

Last post Thu, Jun 21 2012 6:12 AM by Aldo2. 2 replies.
Started by Aldo2 21 Jun 2012 05:32 AM. Topic has 2 replies and 2382 views
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  • Thu, Jun 21 2012 5:32 AM

    • Aldo2
    • Top 150 Contributor
    • Joined on Mon, Aug 29 2011
    • Posts 43
    • Points 650
    hbsp convergence issue Reply

    Hello,

    I'm running hbsp simulations on a mixer. When S-parameters are calculated the following message is shown in the spectre.out form:

    Warning: Insufficient norm reduction in GMRES.
    Warning: Switching to the basic preconditioner automatically.
    Warning: Stagnation still happened in GMRES with basic preconditioner.
    Warning: GMRES did not converge to the desired tolerance of 1e-06. It converged to 0.743312. The solution may not be accurate but it's saved anyway.
    Warning: Insufficient norm reduction in GMRES.
    Warning: GMRES did not converge to the desired tolerance of 1e-06. It converged to 0.99660473. The solution may not be accurate but it's saved anyway.

    I set 9 harmonics for LO and 7 for RF with oversample 1 or 2.

    Any suggestions for a better precision of the results?

    MMSIM version: 11.1

    Thank you very much

    Aldo

    • Post Points: 20
  • Thu, Jun 21 2012 5:56 AM

    Re: hbsp convergence issue Reply

    Aldo,

    I've not seen this before (and can't find a report of it either), so please contact customer support.

    Thanks,

    Andrew.

    • Post Points: 20
  • Thu, Jun 21 2012 6:12 AM

    • Aldo2
    • Top 150 Contributor
    • Joined on Mon, Aug 29 2011
    • Posts 43
    • Points 650
    Re: hbsp convergence issue Reply

    Ok, many thanks.

    Regards

    Aldo

    • Post Points: 5
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Started by Aldo2 at 21 Jun 2012 05:32 AM. Topic has 2 replies.