hello,
please find here attached a former application note discussion about the use of smd coil as antenna for RFID and NFC. This document refers to product that as been replaced by M24LRXXE-R and more recent ST25DV family but is still relevant because the tuning capacitance and RFID protocol is the same.
you'll find at https://www.st.com/en/evaluation-tools/ant3-m24lr04e.html a demo board based on M24LR04E-R using such SMD coil as antenna. its bill of material gives an example of coil from the market (https://www.st.com/resource/en/bill_of_materials/ant3-m24lr04e_bom.pdf) All smd inductors not shielded, with same inductance value will fit.
best regards,
NFC/RFID tags /dynamic tags support team
