I am trying to make the MFRC522 (https://www.nxp.com/documents/data_sheet/MFRC522.pdf) to work with a taoglas 50-Ohm antenna (http://taoglas.com/images/product_images/original_images/FXR.01.07.0100C.A.pdf)

To start I based my schematic and layout in the arduino RFID board but the problem here is that this board uses a PCB antenna and the circuit is composed with EM filter and impedance matching.

I think that as I am using a 50-Ohm antenna, I don´t need to build the impedance matching part, but the problem is that I can´t find a place I can get a circuit for MFRC522 with a 50-Ohm antenna.

I appreciate all the help!



My question is what is the circuit I need to build between the MFRC522 and the Antenna. And what is the values of the components.

  • \$\begingroup\$ What is your question? \$\endgroup\$
    – Tyler
    Jan 10 '17 at 21:15
  • \$\begingroup\$ What is the circuit I need to build between the mrfc522 and the antenna. And the values of the components Thank! \$\endgroup\$
    – user5343
    Jan 11 '17 at 16:40
  • 1
    \$\begingroup\$ Please edit your question, to include the question. \$\endgroup\$
    – Tyler
    Jan 11 '17 at 16:44

After a long night I figured out what to do.

This PDF, Design of MF RC500 Matching Circuits and Antennas (alternative source), has a detailed info about how to implement what I wanted.

This is the image of the circuit I implemented, just needed to change some values of caps, but all near to the ones in the image. Worked perfectly.

Values for the EMC- Filter and Receiving Circuit Values for the impedance transformation 50 Ω Short Range solution: 50 Ω impedance transformation using one driver stage


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.