A Solar/Thermoelectric/Triboelectric/Vibration/RF hybrid energy harvesting based high efficiency wireless power receiver

This paper presents a RF/Solar/Thermoelectric/Triboelectric/Vibration hybrid energy harvesting based high efficiency wireless power receiver (WPR). The proposed WPR architecture incorporates a high-power path and a low-power path maintaining high power conversion efficiency (PCE) over a wide input power range (-10 dBm to 30 dBm). Time-domain Maximum Power Point Tracking (MPPT) is proposed for Solar/Thermal Energy Harvester. High Efficiency Full Wave Rectifier (FWR) is designed for Triboelectric/Vibration Rectifier. A 5.8 GHz RF DC-Converter with adaptive matching is proposed to increase the dynamic range of input power. The chip is implemented in 0.18 μm Bipolar-CMOS-DMOS (BCD) process. The die area of the chip is 2.8 mm x 5.0 mm, including the pads. The high-power RF-DC converter operating at 5.8 GHz frequency achieves a measured PCE of 76.9% at 30 dBm (1 W). The solar energy harvester achieves a peak PCE of 69.85%. The low-power RF-DC converters operating at 900 MHz and 2.4 GHz achieve peak measured efficiencies of 73% and 71.9% at 0 dBm (1 mW), respectively. The Buck-Boost DC-DC converter employed in the proposed WPR architecture achieves a peak measured PCE of 94.5%.