双频带柔性人工磁导体结构研究

Research of Dual-Band Flexible Artificial Magnetic Conductor Structure Element

人工磁导体能够减小人体生物组织对人体通信天线性能的影响。根据等效电路模型以及软件优化仿真明确3×3人工磁导体结构单元形状和尺寸参数。结合人体手臂生物组织模型进行仿真,以0.05 mm厚度聚酰亚胺为基底材料、铜为导电材料,加工制作正方形人工磁导体结构辐射单元和天线并在人体手臂进行实测。仿真与测试结果表明辐射单元结构尺寸设计为S1=24 mm,S2=23 mm,S3=12 mm,S4=7 mm,能够确保天线工作在2.45 GHz和5.80 GHz双频段,将人体SAR值在2.45 GHz时降低了86%,在5.8 GHz降低了64%,AMC结构和天线相距5 mm时,实测天线回波损耗S（11）参数曲线与理论结果相符,可以满足双频带安全人体通信的应用需求。

Artificial magnetic conductor can reduce the influence of human biological tissues on the performance of human communication antenna. According to the equivalent circuit model and the optimization simulation software, the shape and dimension parameter of the 3 ×3 artificial magnetic conductor are clearly defined. In the designed process, combined with the human arm tissue model. Square artificial magnetic structure of the radiation unit and the antenna are manufactured with 0.05 mm thick polyimide-based material, copper conductive material. Simulation and experimental results show that the size of the radiation unit is designed to be S =24 ram1, S2 =23 ram, S3 = 12 mm and S4 =7 mm, which can ensure that the antenna works in the dual band of 2.45 GHz and 5.80 GHz, decreased human SAR value to 86% and 64% correspondingly. When the AMC structure and the antenna are 5 mm away from each other, the measured S11 curve of the antenna return loss agrees with the theoretical result, which can meet the application requirements of the dual band safe human body communication.