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针对集成片上天线(OCA)的超高频射频识别(RFID)标签设计了一款RFID专用协议的基带处理器,以满足RFID标签嵌入纸张及微小物体的防伪功能。由于OCA与读写器天线近场耦合获取能量有限,集成OCA的无源标签对功耗要求更加苛刻。针对微小OCA标签的应用需求,采用异步电路、门控时钟、低压库、多时钟域等低功耗设计方法,设计了专用协议标签基带处理器,其CMOS低压库的设计可以使基带处理器在0.5 V的电源电压下工作,综合布局布线后,其电路仿真结果表明,峰值功耗仅为0.32μW。标签芯片在UMC 0.18μm标准工艺下流片,测试结果显示,在读写器输出20 d Bm能量的情况下,带OCA标签的读距离可达2 mm。
A UHF radio frequency identification (RFID) tag for integrated on-chip antenna (OCA) is designed with an RFID-specific baseband processor to meet the RFID tag’s anti-counterfeit function of embedding paper and tiny objects. Due to the limited energy coupling between the OCA and the reader antenna, the integrated OCA passive tag requires more stringent power consumption. Aiming at the application requirements of tiny OCA tags, a dedicated protocol label baseband processor is designed by using low power consumption design methods such as asynchronous circuit, gated clock, low voltage bank and multiple clock domains. The CMOS low voltage bank is designed to enable the baseband processor at 0.5 V power supply voltage, integrated layout, the circuit simulation results show that the peak power consumption is only 0.32μW. The tag chip is streamed in the UMC 0.18μm standard process. The test results show that the reading distance with the OCA tag can reach 2 mm when the reader outputs 20 d Bm of energy.