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NFC: Rmatch value for matching circuit

Question asked by Asael Hernandez on May 12, 2020
Latest reply on May 20, 2020 by Kan_Li



I am designing the NFC antenna and using PN532 NFC controller for a project. I'm not a expert about NFC or RF circuits.


I have some questions about Rmatch.


About Rmatch I understand that need to be measure with an impedance or network analyzer. But, for prototype design, with what value of Rmatch I can obtain values for matching? What value of Rmatch should I start with?


Is there only a Rmatch = 50 Ohms or is there a range?

If there is a range, what is the range?, and, how affect a greater or lesser value of Rmatch to the NFC circuit?


Thanks for your replies