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is there a possible for me to add nfc function to rfid reader?

Baker Jen
Prodigy 50 points

hi 

i would like to add nfc function to such long range uhf rfid reader ?

could it possible?

  • 0
    TI__Guru* 91206 points

    by what do you mean exactly? 

    NFC is a protocol, a method (from one of three modes) of operation and represents an air interface that is common to other applications.

    if you mean to add active P2P with a UHF RFID reader - this has been done at multiple frequencies for over a century now. Frequency bands are regulated by regional agencies. in the US, this frequency band is limited to 1W and has to be Spread Spectrum. You can add up to 6dBi antenna for 4W EIRP. 

    the Part which covers this band is 15.247. the key point i would make about this is here, in this band, you have 400mSec on a channel to do whatever you need to do, then move to another channel. You have at least 50 channels if the channel BW is less than 250kHz. 

    anyway - might be a piece of work to implement with a UHF reader, you could start there i suppose with the radio itself, but you would have to implement all the rest yourself. plus, things like this are being done in this band these days i think with protocols like  LoRa, SigFox, etc.

      

  • 0 in reply to Josh Wyatt
    Prodigy 50 points

    thanks.

    your suggestion is very helpful for me.

    by the way, could i change it these two uhf rfid reader into hf rfid reader ?

    because of  these two item long range uhf rfid readers i purchased, the  frequency band is 840~868MHz/902~928MHz.

    i want to change it lower with nfc function.

    thanks

  • 0 in reply to Baker Jen
    TI__Mastermind 44140 points

    Hi Jen,

    I recommend talking to the manufacturer of the reader that you have, but I can pretty much guarantee they do not have any provisions to operate a UHF reader at 13.56MHz.  The operating frequency is very different and UHF operates in the e field, while HF(13.56MHz) operates in h field. 

    If you are looking to evaluate an NFC reader, you could check out our NFCLink kit.  Please be aware that this is not an end user product though.  It is a development kit.  Also, NFC range is considerably shorter than UHF, so only expect a few centimeters range.

    https://store.ti.com/nfclink-bndl.aspx