Analysis & Postprocessing

Postprocessing results

94 Topics 261 Posts
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  • Export E-field due to each antenna

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    It depends on what you mean by transmitting and receiving. If the port outputs of the antenna look like 50 ohms in both transmit and receive then the usual multiport simulation will work just fine. Then you just need to go into each port, say "port extract" then go to overall field, then extract that ports E field. This E field will be what is generated from exciting port n and "receiving" on all other antenna. Do this 8 times for all 8 ports and this should be what you want

  • Calculate Divergence of B field

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  • [Error] Input field array is empty

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    Wow I can't believe I missed that. Thank you so much! The warning definitely threw me off

  • B1 rms field

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    Note that the above is only true in the case of a harmonic signal, which is why Sim4Life does not provide the RMS by default. It is up to the user to calculate the RMS based on their knowledge of the signal.

    If you are interested in B1+/B1-, the rotational components of B1 are by definition constant in time and so their RMS magnitudes are equal to their absolute magnitudes.

  • Remove background from psSAR surface viewer

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    When you used the Mask Filter, did you check the option 'Invalidate Masked Values'? This will set the Background to NaN, which should hide it. Otherwise, the Background value will be changed to a user-defined replacement value, which would still show up during visualization.

  • 1 Votes
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    @halder Thank you for your response. I want the total current of 1 mA flowing between my two electrodes. In this case, I should put the target value as (1 mA/area of the plane I have drawn between two electrodes)?
    since my plane area is 182mm*220mm, then I should select the target value to be 0.024975 A/m2. Is this the correct approach?

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  • Padding field with constant value

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  • Import modulation file

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    Really sorry, I honestly don't understand - I don't know what you mean with modulation and I'm not sure what you mean with using matlab and what input file you are exactly referring to. Maybe some screenshots will help, otherwise maybe contact support

  • Export large files to matlab

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    Hi,
    There is a file size limit with the MATLAB exporter but it will be improved. In the mean time, you might

    use a smaller field sensor than the overall field and try to limit the size of the field of view to the volume of interest only
    or export to Cache instead of MATLAB. This is an HDF5 file. You can use multiple libraries and functions in MATLAB to import an HDF5 file. This format can handle very large data files.
  • Magnetic induction power analysis

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  • Thermal

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  • Time Domain

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    Hi,

    Currently, there is no tool in Sim4Life allowing you to extract the S-parameter in time domain. You might evaluate it via Python scripting (using already available time-domain data of voltage and current at ports or inverse Fourier Transform). Sim4Life team is informed to include this request in the development plan and will inform you in the future once it is implemented.

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    I've solved the issue. The sweep works if I set the source for the QS solver to a coil (wire current settings) instead of linking in that data from the SV solver (vector potential settings).

  • 0 Votes
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    Hi Vasilis,

    The Hyperthermia Optimizer and Template are licensed products that are not part of the Sim4Life light student version.

    Best,
    Habib

  • scalar product of two vector fields

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    Hi Gia,

    There is no tool that computes the scalar product for the J-fields from two sensors/simulation. However, you can try to access the fields from Python and compute the product yourself.

    You can extract the J-field in the UI, and then right-click the lowers algorithm in your Analysis tree and select ToPython. This will help you with writing a script to extract certain quantities.

    Best,
    Habib

  • Question about the flux evaluation

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    J(x,y,z,f0) is the volume current density:

    081c7de2-7f8f-4450-8e4c-bd69ad8a8ec7-image.png

    So integrating it's flux across a surface, one gets A/m^2 m^2, which simplifies as A. The unit shown in the table viewer unfortunately does not do the simplification...

  • Impedance plotting

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    Dear @Michael-0

    Please refer to books like Microwave Engineering by Pozar. The impedance matrix is defined as shown in the attached figure (from Pozar) and Z_ii is the input impedance seen looking into port i when all other ports are open-circuited.

    inpedancematrix.png

  • This topic is deleted!

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