工作频率低至 -28 分贝的能量收集无线运动传感器

IF 2.3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE journal of radio frequency identification Pub Date : 2024-03-07 DOI:10.1109/JRFID.2024.3374648
Yero Dia;Helena Ribeiro;Laurent Oyhenart;Elie Zaraket;Ludivine Fadel;Valerie Vigneras;Corinne Dejous;Nuno Carvalho;Simon Hemour
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引用次数: 0

摘要

零功耗设备是下一代物联网。它们通常利用环境能源或通过远程读取器激活,其首要挑战是与最近的射频源的操作距离。遗憾的是,由于这些系统的最小激活功率(也称为读取灵敏度),它们只能在几十米的范围内被激活。这项研究将采集功率降低到了-28dBm(1.5 美元)的新阈值。我们展示了一种在突发模式下工作的无线运动传感器,其直流电压低至 120 mV,存储能量为 0.72 \mu \text{J}$。由于采用了四级整流器为隧道二极管压控振荡器(VCO)提供偏压,因此无需任何直流/直流转换即可实现这种高效运行。
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A Wireless Motion Sensor Operating Down to −28-dBm Energy Harvesting
ZeroPower devices are the next generation of Internet of Things. Typically taping from ambient energy, or activated by a remote reader, their first and foremost challenge is the operation distance from the nearest RF source. Unfortunately, these systems can only be activated within a range of a few tens of meters due to their minimum activation power (also named reading sensitivity). This work reduces the harvesting power to a new threshold of −28dBm ( $1.5 \mu \text{W}$ ). We demonstrate a wireless motion sensor operating in burst mode with as low as 120 mV of DC voltage and $0.72 \mu \text{J}$ of stored energy. This efficient operation is achieved without any DC/DC conversion thanks to a four-stages rectifier biasing a tunnel diode Voltage-controlled oscillator (VCO).
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