宽带多谐振偶极子天线设计  

Design of wideband and multi-resonant dipole

作　　者：杨国[1] 肖如奇 沈飘飘 李梦洁 吴文[1] Yang Guo;Xiao Ruqi;Shen Piaopiao;Li Mengjie;Wu Wen(School of Electronic Engineering and Optoelectronic Technique,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094

出　　处：《电子测量与仪器学报》2023年第5期136-142,共7页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(62071235)项目资助。

摘　　要：根据目前无线通信系统发展小型化与宽带化的趋势,设计了一款具有多谐振点的宽带偶极子辐射天线。首先通过特征模理论分析倒T型导体结构得到两个谐振模式;然后在不影响倒T型导体结构谐振特性的前提下,引入寄生谐振偶极子单元;最后在3个谐振模式的电流共同最大处添加集总端口,同时激励3个谐振模式,得到3个谐振点的宽带谐振天线。天线的仿真与实测结果基本吻合,最终的工作带宽为1.8~2.56 GHz(相对带宽为34.9%)。由此,所设计的天线不仅结构简单,且性能方面良好,可广泛应用于无线通信系统中。According to the current trend of miniaturization and broadband development of wireless communication systems,a broadband dipole with multiple resonant modes is designed.First of all,the resonant modes of the inversed T-shaped conductor are analyzed by the theory of characteristic mode and the first two resonant modes are chosen;then a parasitic resonant dipole element is introduced without affecting the resonant characteristics of the inversed T-shaped conductor;finally,a lumped port is placed at the place that the three resonant modes have common maximum current value,these three resonant modes are excited simultaneously,and a wideband resonant antenna with three resonant modes is obtained.The simulated and measured results are in good agreement,with the final operating bandwidth of the antenna ranging from 1.8 to 2.56 GHz(34.9%relative bandwidth).As a result,the designed antenna is not only simple in structure,but also good in performance and can be widely used in wireless communication systems.

关 键 词：谐振天线 宽带天线 偶极子天线 特征模理论 

分 类 号：TN821.4[电子电信—信息与通信工程]