Is it possible to increase the distance between NFC Tag and NFC slot, if i do so with the help of cable then is there any power loss happen?

[Heena]

Hello, 

I am using the SDK 15.3.0 on nrf52832 DK evolution board, Segger Studio IDE.

Is there any issues with having the NFC tag extended a meter away from the PCB??

How that can be achievable, without power loss??

Kindly provide the solution.

Regards,

Heena Jadaun

 

[Carl Richard]

Hello, Heena!

There will be issues unfortunately.

For security(among other things) the standard specifies NFC to work below 20 cm, so a meter is not very feasible. Especially without power loss.
I would recommend you to take a look at external HF(<1 meter) and UHF RFID(>1 meter) RFID solutions.

Best regards
Car Richard

[awneil]

Heena said:

Is there any issues with having the NFC tag extended a meter away from the PCB

You mean having the NFC antenna coil "far away" from the nRF52 ?

  +-------------------+                           +------------------+
  |                   |                           |                  |
  |        NFC        |     wires / PCB trace     |       nRF52      |
  |      Antenna       ===========================                   |
  |       coil        |                           |        PCB       |
  |                   |                           |                  |
  +-------------------+                           +------------------+

Yes, that will certainly have issues!

The NFC coil is a tuned RF circuit - so you will have to redesign it to get the correct RF resonance. Are you a competent RF designer?

Probably a better idea is to use an external NFC reader chip, and connect it via some suitable interface (eg, I2C, SPI, UART) to the nRF.

Or move the nRF to where the NFC coil needs to be ... ?

[Heena]

awneil said:

The NFC coil is a tuned RF circuit - so you will have to redesign it to get the correct RF resonance. Are you a competent RF designer?

Thanks for your reply.

I am not a competent RF designer, so it is not possible for my end to redesign the RF circuit.

awneil said:

Probably a better idea is to use an external NFC reader chip, and connect it via some suitable interface (eg, I2C, SPI, UART) to the nRF.

can you give me some reference of such NFC reader chips or links where it is connected with nrf52832?

It will be great help..

[awneil]

Heena said:

can you give me some reference of such NFC reader chips

Try these for starters:

https://www.nxp.com/products/identification-security/rfid/nfc-hf/nfc-readers:NFC-READER

https://www.st.com/en/nfc/st25-nfc-rfid-readers.html

http://www.ti.com/wireless-connectivity/other-wireless-technologies/overview/nfc-rfid.html

I expect they'll have standard microcontroller interfaces - I2C, SPI, etc ...

[Heena]

Thank you, this will help me out..