Efficient far-field radio frequency energy harvesting for passively powered sensor networks

被引：546
作者：
Le, Triet [1 ]
Mayaram, Karti [1 ]
Fiez, Terri [1 ]
机构：
[1] Oregon State Univ, Sch Elect Engn & Comp Sci, Corvallis, OR 97331 USA
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2008年 / 43卷 / 05期
关键词：
far field; floating gate; high efficiency; interface circuit; micro power; passively powered; power conversion; RF powered; rectifier; sensor network;
D O I：
10.1109/JSSC.2008.920318
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An RF-DC power conversion system is designed to efficiently convert far-field RF energy to DC voltages at very low received power and voltages. Passive rectifier circuits are designed in a 0.25 mu m CMOS technology using floating gate transistors as rectifying diodes. The 36-stage rectifier can rectify input voltages as low as 50 mV with a voltage gain of 6.4 and operates with received power as low as 5.5 mu W (-22.6 dBm). Optimized for far field, the circuit operates at a distance of 44 m from a 4 W EIRP source. The high voltage range achieved at low load current make it ideal for use in passively powered sensor networks.
引用
收藏
页码：1287 / 1302
页数：16
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