Inductance of NFC antenna

ttttC
ttttC Altair Community Member
edited October 2020 in Community Q&A

Hi there,

 

I am trying to design an NFC antenna using FEKO therefore I would need to know the inductance of the antenna in order to match the resonant frequency 13.56MHz. 

How can I calculate the inductance of the antenna using FEKO? I found sometimes it appears in output file but sometimes there is none. 

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Answers

  • Mel
    Mel Altair Community Member
    edited November 2019

    If you add any voltage or current source the results will be available in POSTFEKO under Source data.

     

    It will also be in the OUT file. If not, please provide an example of where this data is not given?

  • ttttC
    ttttC Altair Community Member
    edited November 2019

    I could only find the impedance under Source data. 

    image.png.50c2ea976f3e9a2c18dd6f098959104d.png

     

    I found either capacitance or inductance in the OUT file but is there a way to compute both of them?

    image.png.e0cae189e3485026c484de447f9c5690.png

  • Mel
    Mel Altair Community Member
    edited November 2019

    If the imaginary part of the impedance is positive then you will get the inductance.

    E.g.

    Impedance in Ohm  1.4910E+03  9.1526E+02  1.7495E+03       31.54
     Inductance  in H  3.1862E-06
     

  • angel
    angel Altair Community Member
    edited December 2019

    plot impedance in smith chart . use 1 MHz reactance as inductance

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