Experimental Observations on Hybrid RF-Solar Energy Harvesting Circuit for Low Power Applications

Gurinder Singh, Fatima Mumtaz, V. Bohara, A. Srivastava
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引用次数: 4

Abstract

This paper investigates the performance of hybrid RF-Solar harvesting circuit that can simultaneously harvest power from solar and radio frequency (RF) sources readily available in the surrounding environment. The proposed work utilizes stand-alone RF and solar harvester circuits to realize a hybrid harvester circuit. The stand-alone RF harvester circuit is a dual-band multi-stage harvester that has been designed to work at GSM 900 MHz and Wi-Fi/WLAN bands. The standalone solar harvester circuit comprises of a solar panel with inbuilt rectifier circuit. The output DC voltage is obtained across the load of the two harvester circuits. The load of the two stand-alone harvester circuits are connected in series to provide DC voltage addition ensuring maximum power transfer at the load resistance of the hybrid harvester circuit. The performance of hybrid circuit has been evaluated for outdoor environment at different times over a day. Even when there is a sudden drop in power coming from standalone RF or solar harvester circuit, the power of hybrid harvester circuit does not fall abruptly due to backup from other dominant harvester circuit. This avoids sudden drop in power requirement by a device ensuring its continued operation and safety.
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低功耗射频-太阳能混合收集电路的实验观察
本文研究了一种混合射频-太阳能收集电路的性能,该电路可以同时收集周围环境中现成的太阳能和射频源的能量。提出的工作利用独立射频和太阳能采集器电路来实现混合采集器电路。独立射频采集器电路是一个双频多级采集器,设计用于GSM 900 MHz和Wi-Fi/WLAN频段。独立的太阳能集热器电路由内置整流电路的太阳能板组成。输出直流电压是在两个采集器电路的负载上获得的。两个独立收割机电路的负载串联在一起,以提供直流电压附加,确保在混合收割机电路的负载电阻处传输最大功率。对混合电路在一天内不同时间的室外环境下的性能进行了评估。即使当独立射频或太阳能采集器电路的功率突然下降时,混合采集器电路的功率也不会由于其他主要采集器电路的备份而突然下降。这样可以避免设备的功率需求突然下降,确保设备的持续运行和安全。
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