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We present an autonomous end-to-end 2.4GHz RF energy harvesting and storage system suitable for harvesting energy from WiFi and similar devices. The system is designed to collect ultra-low power ambient RF input energy and automatically store it into a battery. Previous work in this area required a pushbutton switch for full functionality — RF energy is first stored in a capacitor and manually transferred...
An RF energy harvesting and storage system is described that trickle charges a battery from incident power levels as low as −25 dBm referred to the feedpoint of an 8 dBi patch antenna. The circuit is optimized for the indoor ambient power range typically observed in the 2.4 GHz ISM band so that we can harvest the energy provided by nearby Wi-Fi, Bluetooth and other devices. In this incident power...
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