Can a smartphone transmit/receive 125KHz?

AI Thread Summary
Smartphones are not equipped with antennas capable of transmitting or receiving 125KHz RFID signals, as their hardware is designed for higher frequencies like NFC at 13.56MHz. The difference in antenna design between UHF mobile phones and the wire loop antennas required for 125KHz makes it impractical for smartphones to handle these low frequencies. While it is not feasible to use a smartphone directly for this purpose, an external 125KHz RFID reader/writer can be connected via the USB port of an Android phone. Therefore, the necessary hardware for reading 125KHz RFID tags does not exist within standard smartphones. Exploring external solutions is recommended for this application.
YanivW
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As part of my final project in my EE studies I was thinking if it is possible to read 125KHz RFID tags with a smartphone. I know it is possible with NFC (13.56MHz) and I was thinking about implementing a 125KHz reader. Is there any antenna in a regular smartphone that can deal with these low frequencies? I'm not talking about rather it is possible to use it for this purpose, but just to know if the required hardware exists.
Thanks! :smile:
 
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YanivW said:
As part of my final project in my EE studies I was thinking if it is possible to read 125KHz RFID tags with a smartphone. I know it is possible with NFC (13.56MHz) and I was thinking about implementing a 125KHz reader. Is there any antenna in a regular smartphone that can deal with these low frequencies? I'm not talking about rather it is possible to use it for this purpose, but just to know if the required hardware exists.
Thanks! :smile:
What have you found with your Google searches so far?
 
YanivW said:
I'm not talking about rather it is possible to use it for this purpose, but just to know if the required hardware exists.
It might, but I would not expect a phone to work below 10MHz. There will be a big difference between the small antenna needed on a UHF mobile phone and the wire loop antenna that would be needed for a 125kHz RFID tag.
 
There is no antenna in any common smartphone capable of that. On the other hand you could connect a cheap external 125kHz RFID reader/writer to the USB plug of an android phone.
 

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