How can I use FEKO to calculate low frequency magnetic field of dielectric objects？

Rongchuan Bai
Rongchuan Bai Altair Community Member
edited December 2023 in Community Q&A

Hello, could you help me solve the following problems? I need to solve the low-frequency scattering problem of the medium under the irradiation of plane waves. However, when I use the volume integral equation, I find that the electric field can be solved accurately, but the low-frequency component of the magnetic field is completely wrong. Even if the low frequency stabilization is turned on, it does not work. How can we find the low-frequency near-field scattering of dielectric objects irradiated by plane waves?It is worth mentioning that the medium is the simplest linear medium，Thanks a lot.

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Answers

  • Torben Voigt
    Torben Voigt
    Altair Employee
    edited December 2023

    Hi @Rongchuan Bai ,

    would it be possible to attach the model here?

    Best regards,
    Torben

  • Rongchuan Bai
    Rongchuan Bai Altair Community Member
    edited December 2023
    Torben Voigt_20420 said:

    Hi @Rongchuan Bai ,

    would it be possible to attach the model here?

    Best regards,
    Torben

    Hello, my running example is a simple dielectric sphere. I would like to ask the low-frequency scattered electric field does not decrease with the decrease of frequency, maintaining a constant value, but the magnetic field will decrease with the decrease of frequency, why does this phenomenon occur? Because considering that the scattering electric field and magnetic field are dual in terms of electric current and magnetic current. I think that conclusion might be wrong? I hope you can enlighten me, thanks a lot.

  • Torben Voigt
    Torben Voigt
    Altair Employee
    edited December 2023
    Rongchuan Bai said:

    Hello, my running example is a simple dielectric sphere. I would like to ask the low-frequency scattered electric field does not decrease with the decrease of frequency, maintaining a constant value, but the magnetic field will decrease with the decrease of frequency, why does this phenomenon occur? Because considering that the scattering electric field and magnetic field are dual in terms of electric current and magnetic current. I think that conclusion might be wrong? I hope you can enlighten me, thanks a lot.

    Hi @Rongchuan Bai ,

    would it be possible to attach the model here? It is difficult to judge what the cause is, but it is most likely related to the electrical size of the model. Low frequencies don't exactly make it easy for the solver. Double precisision may be necessary, perhaps even low frequency stabilization. 

    Best regards,
    Torben

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