形变稳定的负磁导率超材料双频柔性天线  

Deformation-stable dual band flexible antenna based on negative permeability metamaterials

作　　者：王蒙军 靳善美 户天宇 吴迪 WANG Mengjun;JIN Shanmei;HU Tianyu;WU Di(School of Electronics and Information Engineering,Hebei University of Technology,Tianjin 300401,China;State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Tianjin 300401,China)

机构地区：[1]河北工业大学电子信息工程学院,天津300401 [2]电工装备可靠性与智能化国家重点实验室,天津300401

出　　处：《电子元件与材料》2024年第3期335-346,共12页Electronic Components And Materials

基　　金：国家自然科学基金面上项目(62071166)。

摘　　要：为了解决力学形变对柔性天线电磁特性影响的问题,设计了一种形变稳定的柔性天线,利用加载负磁导率超材料结构增加天线的新频段,使天线工作于2.45GHz和5.80GHz频段。分析了负磁导率超材料结构增加天线频段的机理与影响因素,进而总结了电磁-力学多物理场耦合特性。天线整体尺寸为0.24λ_(0)×0.20λ_(0)(λ_(0)为2.45GHz时自由空间的波长),厚度仅为0.001λ_(0),实验结果表明天线在弯曲半径R为10~50mm时频段参数不变。可见加载负磁导率超材料结构单元可以增加天线频段,在一定的力学形变条件下电磁特性仍保持稳定,满足柔性天线超薄小型化的设计需求。To address the adverse effect of mechanical deformation on its electromagnetic characteristics,a flexible antenna was designed with stable performance under deformation.Dual frequency bands were excited at 2.45 GHz and 5.80 GHz by loading the metamaterial with negative permeability.The mechanism and affecting factors were analyzed on the excited frequency bands based upon the negative permeability of the metamaterial.The coupling effect was studied between the electromagnetic and mechanical field.The size is 0.24λ_(0)×0.20λ_(0)for the flexible dual band antenna,and the thickness is only 0.001λ_(0),whereλ_(0)is the wavelength of the electromagnetic wave in free space at 2.45 GHz.The experimental results show that the electromagnetic characteristics of the flexible antenna remain stable at bending radius R from 10 mm to 50 mm.The metamaterial loaded flexible antenna can independently introduce new band,and the electromagnetic characteristics remain stable under certain degree of mechanical deformation.The design method meets the requirement of ultra-thin and miniaturized flexible antenna.

关 键 词：柔性天线 超材料 电磁-力学场耦合 形变稳定 

分 类 号：TN811[电子电信—信息与通信工程]