A UHF/UWB Hybrid RFID Tag With a 51-m Energy-Harvesting Sensitivity for Remote Vital-Sign Monitoring.
A UHF/UWB Hybrid RFID Tag With a 51-m Energy-Harvesting Sensitivity for Remote Vital-Sign Monitoring.
复制标题
具有 51 米能量收集灵敏度的 UHF/UWB 混合 RFID 标签，用于远程生命体征监测。
DOI：
10.1109/tmtt.2020.3017674
复制
发表时间：
2020
影响因子：
4.3
通讯作者：
Babakhani,Aydin
中科院分区：
文献类型：
--
作者：
Lyu,Hongming;Wang,Zeyu;Babakhani,Aydin
报道了一种用于特定目标远程生命体征监测的UHF/UWB混合射频识别标签。该标签通过共同设计一个曲折偶极子天线和一个无源整流器，在UHF波段实现了创纪录的能量收集灵敏度。特别高的质量因素使前端对近场运动敏感，如可穿戴环境中的心跳和呼吸。定制的CMOS集成电路（IC）的功耗约为1，建立在低功耗UWB发射机和电源电压的变化转换为脉冲重复率。该标签由IC和UHF/UWB天线组成，不需要其他分立元件，尺寸为4.2 cmcm，重量为0.93 g。远距离实验验证了标签可以在51 m处从4 W有效各向同性辐射功率UHF发射机无线供电。远程生命体征监测在人类受试者上得到验证，其中UHF电源放置在距离受试者2 m处，功率发射小于20 dBm。这项工作提出了一种基于被动供电的非接触式可穿戴标签的第一种远程生命体征监测解决方案。具有记录灵敏度的远场能量收集前端的设计为未来无电池遥感器的工作提供了参考。
A novel ultrahigh frequency (UHF)/ultrawideband (UWB) hybrid radio frequency identification (RFID) tag is reported for object-specific remote vital-sign monitoring application. The tag achieves a record energy-harvesting sensitivity at the UHF band by codesigning a meander dipole antenna and a passive rectifier. The especially high quality-factor makes the frontend sensitive to near-field motions such as heartbeats and respiration in a wearable setting. The custom CMOS integrated circuit (IC) of approximately 1-power consumption builds around a low-power UWB transmitter and converts the variations in the supply voltage to the impulse repetition rate. The tag consisting of the IC and UHF/UWB antennas requires no other discrete components and features a size of 4.2 cmcm and a weight of 0.93 g. A long-distance experiment verifies that the tag can be wirelessly powered up at 51 m from a 4-W effective-isotropic-radiation-power UHF transmitter. Remote vital-sign monitoring is validated on a human subject, in which the UHF power source is placed 2 m away from the subject with a power emission of less than 20 dBm. This work proposes a first-of-its-kind remote vital-sign monitoring solution based on a passively powered noncontact wearable tag. The design of the far-field energy-harvesting frontend with a record sensitivity serves as a reference for future works on battery-free remote sensors.