Extraction of 13.56 MHz NFC-Reader Antenna Parameters for Matching Circuit Design

The maximum operating distance and the optimum performance (good coupling, lower/moderate power consumption) of even the well-designed NFC-reader-antenna in an RFID system depend largely on the good matching circuit. With the aforementioned objective, the paper presents here a modeling and computer aided design and then parameter extraction technique of a NFC-Reader Antenna. The 3D geometry model of the antenna is then simulated in frequency domain using Comsol multiphysics tool in order to extract the Reader-Antenna parameters. The extracted parameters at 13.56 MHz frequency are required for further RFsimulation, based on which matching circuit components (damping resistance and series & parallel capacitances etc.) of the Reader-Antenna at above frequency have been selected to achieve the best performance of the antenna.