CAJ | 학술논문

提出了一种可以在915MHz ISM频带下工作的、符合ISO/IEC 18000-6B标准的无源UHF RFID应答器的阻抗匹配方法.该UHF RFID应答器具有复数阻抗并从射频电磁场接收能量.该阻抗匹配方法利用天线的寄生电感,通过调整反向散射电路的电容来改变匹配网络的容抗,从而实现ASK调制.而且,该阻抗匹配方法在阅读器、天线与应答器之间达到了最大的功率传输.采用该阻抗匹配方法的应答器芯片通过支持肖特基二极管和EEPROM的Chartered 0.35μm 2P4M CMOS工艺进行流片,经测试其工作距离约为4m.
제출료일충가이재915MHz ISM빈대하공작적、부합ISO/IEC 18000-6B표준적무원UHF RFID응답기적조항필배방법.해UHF RFID응답기구유복수조항병종사빈전자장접수능량.해조항필배방법이용천선적기생전감,통과조정반향산사전로적전용래개변필배망락적용항,종이실현ASK조제.이차,해조항필배방법재열독기、천선여응답기지간체도료최대적공솔전수.채용해조항필배방법적응답기심편통과지지초특기이겁관화EEPROM적Chartered 0.35μm 2P4M CMOS공예진행류편,경측시기공작거리약위4m.
This paper presents a novel impedance matching approach for passive UHF RFID transponder ICs, which are compatible with the ISO/IEC 18000-6B standard and operate in the 915MHz ISM band. The passive UHF RFID transpon- der with complex impedances is powered by received RF energy. The approach uses the parasitic inductance of the antenna to implement ASK modulation by adjusting the capacitive reactance of the matching network, which changes with the backscatter circuit. The impedance matching achieves maximum power transfer between the reader, antenna, and tran- sponder. The transponder IC, whose operating distance is more than 4m with the impedance matching approach, is fabrica- ted using a Chartered 0. 35μm two-poly four-metal CMOS process that supports Schottkv diodes and EEPROM.