一种超短波宽带八木天线的仿真与设计  

Simulation and Design of an VHF Broadband Yagi-Uda Antenna

作　　者：王子华[1] 刘玉龙[1] 段常青 何绍林[1] WANG Zihua;LIU Yulong;DUAN Changqing;HE Shaolin(China Research Institute of Radiowave Propagation,Qingdao,Shandong Province,266107 China;China Electronics Technology Cyber Security Co.,Ltd.,Chengdu,Sichuan Province,610041 China)

机构地区：[1]中国电波传播研究所,山东青岛266107 [2]中国电子科技网络信息安全有限公司,四川成都610041

出　　处：《科技创新导报》2022年第30期101-104,共4页Science and Technology Innovation Herald

摘　　要：本文设计了一种工作在超短波波段的宽带八木天线,使用电磁仿真软件FEKO建模计算,通过馈电振子与引向器近距离耦合的方式改善天线的阻抗特性,使天线在VSWR<2.5条件下的带宽达到了22%。相比于常规的八木天线,该设计将八木天线的带宽提高了1倍,给出了4种天线型式的仿真结果,并进行了对比,清晰地展示了设计的思路和过程,并对比了带宽提高前后天线的方向图和增益,分析了天线结构改变对天线方向性性能的影响。A broadband Yagi-Uda antenna working in VHF with broadband is designed and simulated with the electromagnetic software of FEKO.The impedance characteristics of the antenna are improved by means of close coupling between the feed dipole and the deflector,so that the bandwidth of the antenna under the condition of VSWR<2.5 can reach 22%.Compared with the conventional Yagi-Uda antenna,the bandwidth of the Yagi-Uda antenna is doubled by this design.The simulation results of four antenna types are presented and compared,which clearly shows the design ideas and process.The pattern and gain of antenna before and after bandwidth improvement are compared,and the influence of antenna structure change on antenna directivity is analyzed.

关 键 词：八木天线 宽带 FEKO 近距离耦合 

分 类 号：TN823.17[电子电信—信息与通信工程]