新型射频能量收集系统设计与分析

随着无线传感器网络等电子微系统的发展,作为能量源的电池满足不了长久供电的需求.利用周围环境中的射频能量为自身提供电能已经越来越受到科研工作者的关注.针对目前常用射频能量收集系统转换效率较低的不足,提出了一种由超宽带天线、匹配网络、整流升压电路等组成的新型能量收集系统.利用HFSS软件对超宽带天线进行仿真优化,使得该天线在宽频带下具有较好的特性;通过整流升压电路在不同负载下的整流效率分析,确定了整流器转换效率较高的负载取值范围.新型射频能量收集系统的效率为13.5%,比常用的其他射频能量收集系统的效率提高了将近6%.

Design and Analysis of New RF Energy Harvesting System

With the development of the electronic micro-system,such as the wireless sensor network,the battery can not meet the needs of long-term power supply,more and more attention have been paid on the electronic micro-system to power by harvesting ambient radio frequency energy. In the view of the low conversion efficiency of present commonly used radio-frequency energy harvesting system,this paper proposes a new type of energy harvesting system,which contains ultra-wideband antenna,matching network,rectifying booster circuit etc. By using the HFSS software to optimizie the ultra-wideband antenna,the ultra-wideband antenna are promoted under the wide belt; the load value range of the rectifier conversion efficiency is determined by the analysis of rectifier efficiency based on rectifying the booster circuit under different load. The efficiency of the new type of radio frequency energy harvesting system is close to 13. 5%,the efficiency of commonly used radio-frequency energy harvesting system is nearly increased by 6%.