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Inductance of NFC antenna

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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Mel

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

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

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

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