Hello Lei
PN544 has been off line, and it is designed for mobile application, if you still have some questions, please contact NXP mobile team!
For PN532's antenna design, some guidance are released on official website, see the link, please!
NFC integrated solution|NXP
In addtion, for NFC reader's antenna, solutions are similar, not exist big defference.
Have a great day,
TIC weidong
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