基于谐振式反射器的脑活动探测天线设计  

A Brain Activity Detection Antenna Design Using Resonance-based Reflector

作　　者：张恺然 李晓峰[1] 姜兴[1] 初健祎 钟妙琴 彭麟[1] ZHANG Kairan;LI Xiaofeng;JIANG Xing;CHU Jianyi;ZHONG Miaoqin;PENG Lin(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《电讯技术》2020年第9期1120-1125,共6页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61761012);广西研究生教育创新计划资助项目(YCBZ2019051);桂林电子科技大学研究生教育创新计划项目(2019YCXS016)。

摘　　要：设计了一款用于脑活动探测的超宽带定向天线。该天线采用了平面菱形单极天线的宽频带特性,通过缺陷地结构实现小型化。为了增强天线的定向辐射能力,设计了一种花瓣形谐振式反射器,在较宽频带内产生同相反射,并可减少剖面高度至0.1λ0。该天线整体结构具有尺寸小、重量轻的特点。对天线结构进行仿真优化并加工实测,测试结果与仿真的一致性表明了该天线具有超宽带的特点,实测阻抗带宽为0.91~2.42 GHz(91%),且远场方向图表明了天线具有良好的定向性能,因而该天线可以应用于人脑活动探测等领域。An ultra-wideband(UWB)directional antenna for brain activity detection is designed.The antenna adopts the wide bandwidth characteristics of the flat diamond unipolar antenna,which is miniaturized by defective structure.In order to enhance the directional radiation capability of the antenna,a petal-shaped resonance-based reflector is designed to produce the opposite shot in the wider band and to reduce the profile height to only 0.1λ0.The overall structure of the antenna has the characteristics of small size and light weight.The antenna structure is optimized through simulation and fabricated and tested,the consistency between test results and simulation results indicates that the antenna has the characteristics of ultra-wideband,in fact,the impedance bandwidth is 0.91~2.42 GHz(91%),and the far-field direction map shows that the antenna has good directional performance,so it can be applied in human brain activity detection and other fields.

关 键 词：脑活动探测天线 谐振式反射器 超宽带 定向辐射 

分 类 号：TN82[电子电信—信息与通信工程]