Hi,
Regarding to the NFC Antenna with the 28x30.5mm dimensions.
https://www.seeedstudio.com/NFC-Antenna-p-1805.html
Could you please share the Gerber file? Later I also would like to design customized Antenna in Circular shape with the use of Grove NFC PN532 Eval board & the receiver tag of NTAG215.
Could you also share a reference document or Circular Antenna Gerber file to design.
Thanks