微波传能发射系统电磁辐射安全性研究

Safety of microwave transmission energy electromagnetic environment

无线传能系统工作时在周围空间会激发高频电磁场,因此对无线传能系统有较高的电磁兼容性指标要求.文中通过对无线微波传能系统发射天线周围环境的电磁辐射进行建模和分析,以及微波传能基站对周围环境的电磁影响,研究了无线微波传能发射端周围空间电磁辐射的安全性.发射功率为500 W时,通过计算人体头部的比吸收率值,根据国际射频暴露的安全导则,基于理论分析和仿真实验界定了人体电磁暴露的安全区域,划定基站天线主波束、旁瓣、后瓣的安全距离分别为25m.3m、2m,并给出了无线微波传能基站部署的参考方案,对于无线微波传能的实际应用具有重要的参考意义.

When the wireless energy transmission system works,it will excite high-frequency electromagnetic fields in the surrounding space,so it has high electromagnetic compatibility index requirements for the wireless energy transmission system.In this paper,the electromagnetic radiation of the transmitting antenna in the wireless microwave energy transmission system to the surrounding environment is modeled and analyzed.The security of electromagnetic radiation in the space around the wireless energy transmitter is studied.The electromagnetic influence of the microwave energy transmitting base station on the surrounding environment is studied.When the transmission power is 500 W,the specific absorption rate of the human head is calculated,and then according to the safety guidelines of international RF exposure,the safe area of electromagnetic exposure of the human body is defined based on theoretical analysis and simulation experiments,the safety of the electromagnetic radiation around the wireless microwave transmitting energy transmitting end is studied.The safe distances of main beam,side lobe and back lobe of base station antenna are determined to be 25 m,3 m and 2 m,respectively.A reference scheme for wireless microwave energy transmission base station deployment is also given.