带有集成功率管理的波回收被动射频能源收获器
Ruijiao Li1, Yuquan Hu1, Hui Li1,2
1School of Information and Communication Engneering, University of Electronic Science and Technology of China, Chengdu 610041, China.
Micromachines
|September 27, 2025
概括
本研究介绍了一种用于物联网 (IoT) 设备的新型被动射频能量采集系统 (HR-P-RFEH). 该系统实现了高效率和稳定的输出电压,无需复杂的调节,使得无电池运行.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 收集能源 收集能源
背景情况:
- 低功耗物联网 (IoT) 应用程序的快速增长需要紧的,无电池的电源解决方案.
- 现有的射频能量收割机通常由于活跃的整流器和调节网络而遭受微瓦输入级的复杂性和低效率.
研究的目的:
- 提出一个带有协调回收的,带有集成功率管理 (HR-P-RFEH) 的被动射频能量收集系统.
- 为能源自主物联网和MEMS系统开发一个制造友好的解决方案.
主要方法:
- 设计了一种平面微条架构,配有双阶段电压乘数整流器 (VMR) 和基于杆的波抑制回收网络.
- 电磁/电路共模拟,PCB原型设计和实验测量被用于验证.
- 一个基于BQ25570的单元调节了为稳定的3.3V供应而调整的功率.
主要成果:
- HR-P-RFEH在915 MHz (0 dBm输入,2 kΩ负载) 实现了稳定的1.4 V直流输出和70.7%的峰值整正效率.
- 与传统的整流器相比,输出电压提高了22.5%,效率提高了16.4%.
- 该系统在间歇性射频输入下提供连续运行,适合物联网应用.
结论:
- 拟议的完全被动的,和回收设计提供了具有竞争力的效率,没有主动偏差或适应性调整.
- HR-P-RFEH是下一代能源自主物联网和MEMS系统的可扩展和制造友好的构建模块.
- 这项技术满足了对高效,紧,无电池电源解决方案的需求.
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