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本文提出一款兼容Gen2协议的UHF RFID传感标签，功耗仅9.2µA，灵敏度达-12dBm，输入参考噪声为1.25µVrms。解决了现有被动传感器标签缺乏协议兼容性和高精度信号处理能力的问题，适用于生物医学和环境监测等应用。
Passive RFID technology enables battery-free wearable and implantable sensors with an unlimited lifespan, small size, and sub-gram weight. These properties facilitate advanced biomedical research (such as untethered monitoring of freely-behaving insects and small animals) and unobtrusive human health monitoring. Passive sensor tags reported to date have employed simple ring oscillator temperature sensors with no protocol or addressability [1,2]. However, realistic applications demand accurate processing of µV-level biosignals and compatibility with industry standard RFID protocols. We present a fully-passive 900MHz RFID tag IC with addressability, full EPC Class 1 Generation 2 (Gen 2) protocol compatibility, a 1.25µVrms integrated noise chopper-stabilized micropower sensor interface amplifier, and an 8b ADC. The communication range is 3m with an off-the-shelf RFID reader, enabling previously impossible recording scenarios like in-flight recording from small
Daniel Yeager, Fan Zhang, Azin Zarrasvand, Brian P Otis
University of Washington, Seattle, WA