modal weighting coefficient

Sev Öz
Sev Öz New Altair Community Member
edited November 2020 in Community Q&A

Hi,

I am analyzing the characteristic modes of one unit cell like patch antenna configuration in FEKO. I used surface integral equation and volume integral equation and plane wave excitation. I have problem with phase of modal weighting coefficient. If I change (increase or decrease) the mesh size I have different phase values of modal weighting coefficient for unit cell in volume integral equation.   The magnitude of modal weighting coefficient is too small (under 0.01 for mode 1 and mode2). Is the problem plane wave or the orientation of tetrahedrons which effect the phase of modal weighting coefficient? 

Best regards

Sevda

 
 
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Answers

  • Mel
    Mel Altair Community Member
    edited November 2020

    What is your cell size? Usually these issues arise from using a very small cell size. About a third of a wavelenght or more should be sufficient.

    If you can attach your cfx file, that would help to assist further.

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