Design and Optimization of High Performance Micro RFID Reader Antenna
In order to improve the application range and transmission performance of the RF identification system,a miniature tag antenna with an operating frequency of 13.56 MHz is designed,which adopts inductive coupling for information transmission,and a model of the miniature RF identification antenna is designed by using the 3D high frequency structure simulator(HFSS).The antenna structure,dielec-tric plate thickness,line spacing and number of turns of the coil are visualized and compared by parametric scanning,and the antenna im-pedance matching is completed on the basis of the model.The simulation results show that the designed miniature antenna has good radia-tion performance at the working frequency of 13.56 MHz,its return loss value(S11)reaches-58.18 dB.The antenna has excellent coupling performance,the theoretical transmission distance can reach more than 30 cm.The test results of the miniature RFID reader antenna show that the antenna is significantly better than other designs of the same type under the same environment when working on the 13 MHz-15 MHz frequency band.The measured return loss reaches-37 dB,and the return loss is about-27 dB at 13.56 MHz.The designed micro tag antenna has a broad application prospect in logistics and transportation,book management and wearable devices.
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