基于慢波效应的小型圆极化植入式天线设计  

Design of miniaturized circularly polarized implantable antenna based on slow wave effect

作　　者：范艺 黎济铭 刘雄英[2] FAN Yi;LI Jiming;LIU Xiongying(School of Electronic and Information,Guangdong Polytechnic Normal University,Guangzhou 510665,China;School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]广东技术师范大学电子与信息学院,广州510665 [2]华南理工大学电子与信息学院,广州510640

出　　处：《桂林电子科技大学学报》2019年第6期483-489,共7页Journal of Guilin University of Electronic Technology

基　　金：国家自然科学基金(61372008);广东省科技计划(2015B010101006,2014A010103014)。

摘　　要：为了更方便和有效地传输人体健康数据,设计了一种应用于生物医学遥测的植入式小型圆极化微带贴片天线。天线采用带缝隙的箭头形贴片形成的慢波效应和在贴片中嵌入的V形缝隙延长电流路径实现小型化;引入干扰单元,实现天线圆极化。3层人体模型的仿真结果显示,天线的阻抗带宽为7.2%(2.39~2.57 GHz),轴比带宽为3.7%(2.39~2.48 GHz),完全覆盖工业科学医疗(ISM)2.4~2.48 GHz频段。天线的辐射方向图显示具有左旋圆极化辐射性能,天线的体外实际测试结果与仿真结果相吻合。In order to transmit human health data more conveniently and effectively,a miniaturized circularly polarized(CP)microstrip patch antenna is designed for telemedicine.The proposed implantable antenna is minimized by employing the arrow-shaped slotted patch to form slow wave effect and by embedding V-shaped slots into patch to lengthen the current path,also realizes circular polarization by introducing perturbation unit.The simulated results show that an impedance bandwidth of 7.2%(2.39~2.57 GHz)and an axial ratio bandwidth of 3.7%(2.39~2.48 GHz)at the Industrial,Scientific,and Medical(ISM)band are achieved,respectively.The radiation patterns of the proposed antenna illustrate the performance of left-handed circular polarization.Ex-vivo measured results are in good agreement with the corresponding simulated ones.

关 键 词：圆极化 植入式天线 慢波效应 

分 类 号：TN822[电子电信—信息与通信工程]