Hi,
I am designing an NFC reader based on the ST25R3916B for a payment interface, ensuring compliance with EMVCo standards. For hardware development, I am using the ST25R3916B-EMVCO reference design as my baseline.
Queries:
Custom NFC Antenna Design:
I plan to use the same NFC antenna dimensions (51mm × 27mm) and trace length as the reference board but will design it myself.
How should I approach designing the coil to ensure proper inductance and matching network?
If I change the coil shape but maintain the same number of turns and total trace length, will the matching network also need to be adjusted, or can I use the same network as the reference board?
Impact of Display on NFC Performance:
My design includes a display on the surface of the reader. Will the display impact NFC coil performance?
Should I place the NFC antenna under the display, or is it better to design a ring-shaped PCB antenna around the display to avoid interference?
Using a Third-Party NFC Antenna:
Since EMVCo certification is crucial, I want to keep the design as close to the reference as possible.
If I use an off-the-shelf NFC antenna (e.g., from Toeglass or another manufacturer), will it affect the matching network significantly?
I would appreciate any guidance on these aspects to ensure compliance while optimizing performance.
Thanks in advance!
