RFID Antenna 13.56 MHz

[Andrew77 6]

Hello, 

I'm trying to design a NFC antenna @13.56 MHz for a reader,

Antenna should have around 1,24 uH of inductance as simulation and calculation verified, but i'm not very sure about the set-up of CST (Frequency domain solver)

I don't see Self-inductance up to 60 MHz

I don't find The example given in the Examples of CST: "RFID Reader-Coil, 13.56 MHz CST example"

could someone upload? (CST 2019)

Many thanks

NFC_13_56_MHz_V2.cst

[Admin 2545]

Andrew, please show me, where you found this...???

 

[Andrew77 6]

Hi dear,how are you?

I made antenna by myself, I understand that corners must be rounded but I started with this  version to have a simpler meshing...

The version with rounded corners gives me  quite the same inductance (around 1.24 uH)

I'm looking for the examples inside CST (13.56 mhz coil ) but I have a big db file for examples in CST directory so I don't kown how access

Andrea

[Andrew77 6]

here is the original antenna:

NFC_13_56_MHz.cst

[Admin 2545]

11 minutes ago, Andrew77 said:

here is the original antenna:

NFC_13_56_MHz.cst

 I can't open this file...!!!

But the simulation, is clearly, not correct...

[Andrew77 6]

I past it again...

Simulation are same as mine

Did you use Transient solver? if not what mesh?

Your bounding box how big is?

NFC_13_56_MHz.cst

[Andrew77 6]

Sure,

The antenna is not matched..

Here is just to check the settings...

CST_Article138_RFID Reader-Coil, 13.56 MHz.pdf

Edited April 14, 2020 by Andrew77

[Admin 2545]

[Andrew77 6]

mmm

interesting, but seems lumped port, I don't understand well...

Do you have this example in .cst format?

[Admin 2545]

,,, no, this is from your pdf file...!!!

[vietanh3168 0]

check out my design guidance here for FRID déign and matching