用于体域网无线能量传输的定向纽扣天线研究

Research on directional button antenna for wireless power transfer on body area network

可穿戴技术的进步正推动着体域网组网技术的发展,需要研究向体域网设备提供无线能量传输的定向辐射天线技术。它是以5.8 GHz的纽扣天线为辐射体,并在适当位置添加了人工磁导体(AMC)结构形成定向辐射。其中,人工磁材料的横向尺寸与纽扣天线顶部结构的圆形直径一致以不额外增加整体尺寸,其余包括馈电部分均采用全织物材料。其次,采用真实手臂模型,将两款相同的天线分别置于手臂弯曲处和上臂处进行仿真和测试,结果显示仿真和测试的一致性好。最后,对人体吸收率SAR值进行研究,其值低于通用标准。

The current progress of wearable technology is promoting the development of networking technology for body area network.Therefore,the directional radiation antenna is studied in order to provide wireless energy for the wearable equipment of body area network.This antenna works at 5.8 GHz and takes the button antenna as radiator,then the artificial magnetic conductor(AMC)structures are placed at an appropriate position to form directional radiation.Here,the transverse dimension of the artificial magnetic material is consistent with the diameter of the top loaded circular structure on the button antenna so no extra dimension is added,while the rests are made of all fabric material,including the feeding part.Next,the real arm model is adopted,and the simulation and the measurement are implemented for the two same antennas placed at the bend of the arm and the upper arm,respectively,where they agree well.The SAR value of human body is investigated at last,and they are lower than the general criterion.