A high efficiency rectifier for ambient RF energy harvesting at 940 MHz
This paper presents a simple rectifier working at 940 MHz for low power wireless power transfer (WPT) system. By analyzing different diodes and topologies, a rectifier circuit is designed in an ultra low ambient power density harvesting system. When the input power Pin is 20 dBm and the load is 3000 O, the power conversion efficiency (PCE) is 40.1% and the output voltage is 110 mV. The PCE is larger than 30% over a range of Pin from 23 dBm to 1 dBm.
2016 IEEE International Conference on Microwave and Millimeter Wave Technology (ICMMT)