Hi,
I’ve attached three antenna designs which I’ve downloaded from NXP in Eagle format and imported into Pcbnew. I’ve made some minor adjustments to the Class 6 design and used it myself. I’ve also included my own modified footprint.
I’ve used this design together with an NXP NTAG I2C (NT3H2211W0FTT). To get the best performance from the antenna I used a 18 pF capacitor in parallel with the antenna on my board.
NFC-antennas.zip (22.2 KB)