NFC/RFID Breakout Board and Antenna

Breakout and antenna board for a 13.56 MHz NFC/RFID smartcard IC in the contactless MOB package.

Blog for for more details.

PCB Render

Manufactured PCB

Manufactured by PCBWay.

Usage

Use KiCad with my CustomComponents library to view and edit the hardware project, or download the fabrication files for PCB manufacturing. I used the RF-Tools for KiCAD to create the rounded traces.

Specification

The 39 mm * 39 mm dual-side PCB carries a 35 mm * 35 mm coil on the top side.

The antenna coil has a theoretical inductance of 2.196 µH. To achieve the theoretic ideal inductance of 2.46 µH (for an IC input capacitance of 56 pF), a tuning capacitor C1 (0805 size) of 10pF has to be added. This reduces the inherent resonant frequency from 15 MHz down to 13.8 MHz.

Frequency Response Measurements

These measuremetns were conducted using the NanoNVA device.

Thanks To

This project has been generously sponsored and manufactured by PCBWay. The PCBs turned out great, as usual.

Special thanks to Satur9 for the Coil Inductance Calculator and also general help with the PCB design.