About Mifare antenna design

[Ufuk Varlık]

Hi,
I want design printed mifare antenna. I found e-design in St website. But by value entered, the practice results are wrong.
ANTENNA 1 RESULTS:
-THEORY INDUCTANCE VALUE :1.84 uH
-REAL INDUCTANCE VALUE :3.3 uH
ANTENNA 2 RESULTS
-THEORY INDUCTANCE VALUE :6.62 uH
-REAL INDUCTANCE VALUE :0.7 uH

What is the reason ? Thank you for yours help.

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[TapLinx Support]

Hi Ufuk,

Can you please share the link of this design tool?

Thank you,
The TapLinx team

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[Ufuk Varlık]

member is required
https://my.st.com/analogsimulator/flex_app/bin/eds_antenna_design.html?msg=%7B%22action%22%3A%22new_design%22%7D

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[TapLinx Support]

Hi Ufuk,

The link which you are provided relates to a tool from STMicroelectronics. Sorry, but I cannot talk about tools from other companies.

Sorry,
The TapLink team

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[Ufuk Varlık]

Hi Dear,
These calculations are not general results? I made number of turns 11, because it was directly proportional. I guess, the number of antenna turns should not be more than 6. What do you suggest I do?
Thank you

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