环境电磁能量拾取动力学模型分析

Dynamic Model and Analysis of Ambient RF Energy Harvesting

大规模机器类通信是第5代移动通信的三大应用场景之一,也是下一代移动通信技术研究的重点。未来环境中的物联网节点将越来越多,以环境电磁能量拾取作为能量供给,可以更好地应对物端节点的能源供给问题。文中针对环境电磁能量拾取过程,分析了从环境电磁能量摄入、整流再到储能器件等获取直流能量值的影响,构建了环境电磁能量拾取动力学模型,分析了目标频率、整流电路、电容器件等因素对于环境能量拾取的影响,文中采用实际环境中电磁能量数据作为输入,进行了仿真与理论模型的对比分析,结果显示,理论模型能够为未来环境电磁取能具体应用设计提供技术支撑。

Massive machine type communication,which is one of the three application scenarios of the fifth generation mobile communication,is also the focus of the next generation mobile communication technology research.More and more IoT nodes will be deployed in the real world.The ambient RF energy harvesting technology can be used to solving the problem of energy supply for the IoT nodes.In order to exactly describe the process of harvesting RF energy from the ambient environment,this paper propose a dynamic model,which includes ambient RF power density,rectifier and energy storage device.The model can be used to analyze how the factors,such as target frequency,rectifier and energy storage device,affect the DC power harvested from the ambient environment.Finally,we use some RF power measurement result as input,some simulations are designed to verify the validation and reasonability of the model.Through the comparison of the theoretical and simulation results,the dynamic model can provide theoretical basis and technical support for the application of ambient RF power harvesting.