期刊
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
卷 25, 期 9, 页码 630-632出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2015.2451397
关键词
Ambient energy harvesting; rectifier; wireless power transmission
资金
- National Research Foundation, Singapore [NRF-CRP8-2011-01]
- National Natural Science Foundation of China [61372012]
- Natural Science Foundation of Jiangsu Province, China [BK20131190]
- Suzhou Science and Technology Council, China [SYG201403]
This letter presents a novel dual-band rectifier with extended power range (EPR) and an optimal incident RF power strategy in the settings where the available RF energy fluctuates considerably. It maintains high power conversion efficiency (PCE) in an ultra-wide input power range by adopting a pHEMT in the proposed topology. Simultaneous RF power incident mode is proposed and preferred to the traditional independent mode for multiband harvesting. Measured results show that more than 30% PCE is obtained with input power ranging from -15 dBm to 20 dBm and peak PCE of 60% is maintained from 5 to 15 dBm. Positive power gain is achieved from -20 dBm to more than 10 dBm. Investigation about the effect of RF power incident ratio on dualband harvesting's performance is presented and it provides a good reference for future multi-band harvesting system design.
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