A Fully Integrated Reconfigurable Self-Startup RF Energy-Harvesting System With Storage Capability
A Fully Integrated Reconfigurable Self-Startup RF Energy-Harvesting System With Storage Capability
复制标题
DOI：
10.1109/jssc.2016.2633985
复制
发表时间：
2017-03-01
影响因子：
5.4
通讯作者：
Sanchez-Sinencio, Edgar
中科院分区：
文献类型：
--
作者：
Abouzied, Mohamed A.;Ravichandran, Krishnan;Sanchez-Sinencio, Edgar
本文介绍了一种全集成射频能量采集系统。在额外输出功率期间，该系统可以同时传输外部直流负载所需的电流，并将多余的能量存储在外部电容器中。该设计采用0.18mum的CMOS工艺制作，有源芯片面积为1.08 mm(2)。提出的自启动系统可以通过集成LC匹配网络、RF整流器和电源管理/控制器单元进行重新配置，功耗为66-157 NW。所需的时钟产生和基准电压电路集成在同一芯片上。占空比控制用于在不能提供所需输出功率的低输入功率下工作。此外，射频整流器的级数是可重新配置的，以提高可用输出功率的效率。对于高可用功率，激活二次路径以对外部能量存储元件充电。在1V直流输出下测得的射频输入功率灵敏度为-14.8dBm。
This paper introduces a fully integrated RF energyharvesting system. The system can simultaneously deliver the current demanded by external dc loads and store the extra energy in external capacitors, during periods of extra output power. The design is fabricated in 0.18-mu m CMOS technology, and the active chip area is 1.08 mm(2). The proposed selfstartup system is reconfigurable with an integrated LC matching network, an RF rectifier, and a power management/controller unit, which consumes 66-157 nW. The required clock generation and the voltage reference circuit are integrated on the same chip. Duty cycle control is used to operate for the low input power that cannot provide the demanded output power. Moreover, the number of stages of the RF rectifier is reconfigurable to increase the efficiency of the available output power. For high available power, a secondary path is activated to charge an external energy storage element. The measured RF input power sensitivity is -14.8 dBm at a 1-V dc output.