PN7150 Antenna tunning

[Avee]

Hello All,

We are using PN7150 IC in our custom PCB board and it's working fine in Free Air,

However the Card Reading range is about 35- 40mm without any body,

But, whenever we put the PCB in Metal Body the range reduces to 5mm and it takes longer time to detect the Cards.

Can you please help how we can achieve the higher Range .

[KaiLi]

Hello @Avee 

For your issue, please check 2.3 section of AN11755 (https://www.nxp.com/docs/en/application-note/AN11755.pdf), where would answer your question.