A 2.4GHz ambient RF energy harvesting system with −20dBm minimum input power and NiMH battery storage

Ken Gudan, S. Chemishkian, Jonathan J. Hull, Stewart J. Thomas, Joshua F. Ensworth, M. Reynolds
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引用次数: 36

Abstract

We describe a radio frequency (RF) energy harvester and power management circuit that trickle charges a battery from incident power levels as low as -20dBm. We designed the harvester for the 2.4 GHz RF band to leverage the ubiquity of energy that is produced by Wi-Fi, Bluetooth, and other devices. This paper reports on the design and current status of the harvester and compares our performance to other published results. In this incident power regime, rectified voltages are low, so power management circuit operation in the 100mV regime is critical. This paper describes a novel rectenna design, boost converter, and battery charger for RF energy harvesting specifically tuned to this low-power regime. At -20dBm RF input power, the harvesting system (rectenna, boost converter, and battery charger) sources 5.8μJ into a rechargeable battery after 1 hour.
一种最小输入功率为- 20dBm、镍氢电池存储的2.4GHz环境射频能量收集系统
我们描述了一种射频(RF)能量收集器和电源管理电路,该电路可以从低至-20dBm的入射功率水平为电池涓流充电。我们为2.4 GHz射频频段设计了收割机,以利用Wi-Fi、蓝牙和其他设备产生的无处不在的能量。本文报告了收割机的设计和现状,并将我们的性能与其他已发表的成果进行了比较。在这种入射功率状态下,整流电压很低,因此电源管理电路在100mV状态下的工作至关重要。本文描述了一种新颖的整流天线设计、升压转换器和电池充电器,用于射频能量收集,专门针对这种低功耗状态进行调谐。在-20dBm的射频输入功率下,收集系统(整流天线、升压转换器和电池充电器)在1小时后向可充电电池提供5.8μJ的电源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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