基于混合编码的射频识别无芯片标签设计

Design of Chipless RFID Tag Based on Hybrid Coding

为降低传统射频识别标签成本,提升标签编码容量,文中采用幅值与频率位置混合编码的方法,设计了一种由微带主传输线、收发正交的超宽带天线和长度不等的谐振器组成的,具有大容量编码功能的无芯片射频识别标签。仿真及测试结果表明,该标签在2.37~6.17 GHz频段上得到了20 bit的编码容量,混合编码后可得到60 bit的编码容量。实测3种编码状态的8 bit无芯片标签,显示谐振器频点误差小于10 MHz,能够保证谐振点的准确识别,实现预设的编码功能。该种具有大容量编码功能无芯片标签,降低了物联网系统的成本,可以取代激光条形码应用于物流领域。

In order to reduce the cost of traditional RFID tags and improve the tag coding capacity,by using the method of mixed coding of amplitude and frequency position,a chipless RFID tag with large capacity coding function was designed,which was composed of microstrip main transmission line,ultra-wideband antenna with orthogonal transceiver and resonator with different length.Simulation and test results showed that in the 2.37~6.17 GHz frequency band,the encoding capacity of 20 bit could be obtained,and the encoding capacity of 60 bits could be obtained after mixed encoding.The 8 bit chip-less label of the three coding states measured in the field showed that the position of the resonance point only fluctuates within a small range of 10 MHz,which ensured the accurate identification of the resonance point and realized the preset coding function.This kind of chipless label with large capacity coding function could reduce the cost of the IOT system and replace the laser bar code in the field of logistics.