自供电传感器平台的射频能量采集

N. Radhika, P. Tandon, T. Prabhakar, K. Vinoy
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引用次数: 5

摘要

这项工作展示了一个射频供电传感器平台,其中能量可以在环境FM波段中获得,也可以从专用射频源发射。我们通过射频功率采集和调节专用芯片实现了这一要求。设计了一种基于开关电容的超低功耗DC-DC升压变换器,采用130nm CMOS技术作为环境射频的能量收集电路。片上RF-DC在9.75k电阻负载下的最高效率为44%。在8个主频率的-16dBm输入灵敏度下,以应变计作为传感器的传感器平台每20分钟发布一个BLE数据包。对于专用的发射辐射,设计的混合系统使用低于1 GHz的频率供电。该系统的端到端系统效率为9.1%,数据包传输间隔为90秒。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
RF Energy Harvesting For Self Powered Sensor Platform
This work demonstrates a RF powered sensor platform where energy can be available either in ambient FM band or emitted from a dedicated RF source. We realized the requirement with a dedicated chip built for RF power harvesting and conditioning. A switched capacitor based ultra low power DC-DC boost converter is designed in 130nm CMOS technology as energy harvesting circuitry for ambient RF. The on-chip RF-DC resulted in a maximum efficiency of 44% with 9.75k resistive load. At input sensitivities of -16dBm over 8 dominant frequencies, the sensor platform with strain gauge as sensor advertised a BLE packet every 20 minutes. For dedicated emitted radiations, the designed hybrid system is powered using sub-1 GHz frequencies. The resulting system has an end-to-end system efficiency of 9.1% and packet transmission interval of 90 seconds.
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