I am not any kind of expert. Just want to get design working. I have a problem with an antenna for MFRC522 NFC chip.
I used a generator for NFC antennas. So my antenna has size 25x25mm and 3 turns.
Then I used excel sheet and software provided by NXP for calculating antenna matching circuit.
Schematics:
Values were adjusted to those given by calculator
My PCB:
Right now I can’t read and write tag.
Signal from tag sniffed by oscilloscope shows some kind of communication.
I don’t have vector analyser for characterising antenna.
How to approach this problem?
Hello,
As the device is not recommend for new design we only have available the information and the excel calculation , still for antenna design we recommend the use of some special equipment , you can check more details in the antenna design webinars we have available in the following page .
Hope this helps.
regards,
Estephania