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13.56MHz antenna simulation HFSS(simulation results and actual results are differect)

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feifei1201

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Hi all
Thanks for your help.
I'm simulating a curve antenna under 13.56MHz . Thickness is 5um. Width is 76um.
Capture.PNG
practically, I measured the inductance is 5.5uH.

But the simulation result is 300uH with single lumped port.
1.PNG5.PNG

I tried double lumped ports. The result is 54uH.
3.PNG4.PNG

My settings are as follow:
solution frequency 13.56MHz
sweep type is interpolating.
frequency setup if 13MHz-14MHz 0.01MHz

There are two questions,
1.Should I set single lumped port or double lumped ports? why
2.By which method can I get about 5.5uH in simulation ?
thank you for your help
 

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