对数周期偶极天线研究  

Study of Log Periodic Dipole Antennas

作　　者：杨俊[1] 吴世才[1] 高火涛[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2003年第1期141-144,共4页Journal of Wuhan University:Natural Science Edition

基　　金：国家十五 863计划资助项目 (863 81 8 0 9 1 1 )

摘　　要：针对对数周期偶极天线 (LPDA)设计过程中存在的两个问题 :阻抗矩阵计算方法的选择和高频段方向图的优化问题 ,通过分析比较各种阻抗矩阵计算方法的优劣 ,确定用Galerkin法求解Poclinton方程是最佳方法 ;在设计过程中提出一种新的设计思想———改变天线的结构参数 ,改善天线高频段方向图的性能 ,并以Galerkin法为基础进行计算机模拟 ,结果显示效果良好 。Aiming at solving the two problems in the design of LPDA(log periodic dipole antennas), which are how to choose a good calculation method of mutual impedance matrix and improve the radiation pattern at high frequencies, the thesis analyses and compares the calculation methods. A conclusion is drawn that solving Poclinton equation by Galerkin method is the best. A new method through changing LPDA’s structure is presented to improve LPDA’s radiation pattern at high frequencies,and results of computer imitation show it works well. Meanwhile it can enhance the gain at the whole frequencies.

关 键 词：对数周期偶极天线 阻抗矩阵 矩量法 高频段方向图 GALERKIN法 天线结构 

分 类 号：TN821.6[电子电信—信息与通信工程]