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MFRC522 NTAG213 range improvements

Question asked by Jeremy ST on Jan 29, 2017
Latest reply on Feb 12, 2017 by Jorge_Gonzalez

Hi,

 

My company is using MFRC522 to read the ID of Ultralight tags on a custom PCB for a consumer application.

 

However I have found a significant difference in range between different tags. MiFARE Ultralight NTAG213 only have ~2cm of range whilst an older MiFARE Ultralight tag (not certain of the type but suspect NTAG203) has ~5cm of range.

 

This was confirmed using a 'Arduino compatible' development board.

 

Is it to be expected for the NTAG213 to have a lower range? How could the range be improved? (we have already tuned the antenna to be resonant and 500ohms)

 

Thanks,

Jeremy

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