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Design of an efficient ambient WiFi energy harvesting system

机译:高效的环境WiFi能量收集系统的设计

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This study is focused on equipping wireless devices (including sensors) with novel, high-efficiency circuitry to harvest and convert ambient radio frequency (RF) power to direct current (dc). Key components of this technology are (a) miniaturised antenna and (b) high-efficiency rectifying circuit. The first is responsible for capturing the RF waves, and the latter converts the RF energy to dc. A major challenge is the design of novel circuitry to generate a battery-like voltage from very low incoming RF energy. Under this study, the authors designed a novel RF power harvesting front-end whose conversion efficiency is significantly improved at low RF power levels (,220 dBm) as compared to existing technologies. Thus, the new circuitry can harvest ambient and widely available RF energy, making a game changing technology for powering mobile devices. In this study, the authors demonstrate this technology by using it to power a commercially available temperature and humidity meter with an LCD display. The latter is powered using nothing more than ambient WiFi signals in an office environment.
机译:这项研究的重点是为无线设备(包括传感器)配备新颖的高效电路,以收集环境射频(RF)功率并将其转换为直流(dc)。该技术的关键组件是(a)小型天线和(b)高效整流电路。前者负责捕获RF波,后者负责将RF能量转换为dc。一个主要的挑战是设计新颖的电路,以通过非常低的输入RF能量生成类似电池的电压。在这项研究下,作者设计了一种新颖的RF功率采集前端,与现有技术相比,其转换效率在低RF功率水平(220 dBm)时得到了显着提高。因此,新电路可以收集周围环境和广泛可用的RF能量,从而为移动设备供电提供了改变游戏规则的技术。在这项研究中,作者通过使用该技术为带有LCD显示屏的市售温湿度计提供动力,从而演示了该技术。后者仅在办公室环境中使用环境WiFi信号供电。

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