Antenna Design Method Based On The NFC Technology

NFC, namely close wireless communication, is working in 13.56 MHz .It was used to close (within 10 cm) security communication as a kind of wireless communication technology. In mobile payment system, with the development of function mobile payment by extensive research and application, NFC antenna plays an indispensable part, specially for the mobile payment, the NFC antenna has the function of antenna model proposed at home and abroad.In the master antenna theory basis and antenna simulation software HFSS conditions, this thesis did a large number of experimental simulation, mainly is the study of the NFC antenna design method and its miniaturization. The thesis designs three antennas, respectively is two-sided rectangular antenna, double-sided helical round antenna, single rounded rectangle antenna. At the same time, the inductance of the antenna simulation with the change of the various parameters antenna relations, mainly is the antenna coiling number, coiling width and with the antenna interval equivalent inductance of the relationship between changes, then discusses and analyzes the change trend of various parameters and make a conclusion.Combined with the actual demand, we get a theory of the best performance antenna. Finally, we use the network analyzer in inductance test, the results and the theoretical results are consistent. This thesis also through the parallel capacitor and resistor way, to the three paragraphs antenna, the impedance matching is made in 13.56 MHz place return loss minimum, and reached the very good matching effect. This thesis studies for many different sizes, different shapes of small antenna design and provides the theoretical basis and with the practical significance.