北京航空航天大学学报 ›› 2000, Vol. 26 ›› Issue (1): 8-11.

• 论文 • 上一篇    下一篇

一种宽频带振子天线

吕善伟1, 杨学斌1, 贾晓笑2, 周建军2   

  1. 1. 北京航空航天大学 电子工程系;
    2. 北京 1014信箱
  • 收稿日期:1998-06-22 出版日期:2000-01-31 发布日期:2010-09-27
  • 作者简介:吕善伟(1937-),男,辽宁大连人,教授,100083,北京.

A Kind of Dipole Antenna with Broadband Characteristics

Lü Shan-wei1, YANG Xue-bin1, JIA Xiao-xiao2, ZHOU Jian-jun2   

  1. 1. Beijing University of Aeronautics and Astronautics,Dept. of Electronic Engineering;
    2. PSOTBox 1014,Beijing
  • Received:1998-06-22 Online:2000-01-31 Published:2010-09-27

摘要: 介绍一种宽频带振子天线,它由旋转对称的导体组成,表面形状沿天线轴线方向是按锥面、球台面、圆筒振子顺序光滑连接而成,在中心用50?Ω同轴电缆馈电. 假定天线表面上等效电流的变化仅沿着导体轴向的表面切线方向,用矩量法计算电流分布,选取三角函数为展开函数和权函数. 用一个例子,给出计算的天线输入阻抗、辐射方向图、方向性系数以及输入驻波比随频率的变化,发现所研究的天线具有满意的宽频带特性.

Abstract: The broadband dipole antenna presented is a rotationally symmetric structure consisting of conductor wire whose surface shape is smoothly joined by biconic section, spherical stage and cylinder dipole each other in series in the direction of antenna axis, fed by a coaxial cable with impedance of 50?Ω at center. Assuming that the equivalent current on the surface is variable along the only tangential direction of the envelope in the conductor axis, thecurrent distributions are calculated by means of the moment method. The triangular functions are chosen as the expansion functions and weight functions. An example of the broadband dipole antenna is shown and radiation patterns, gain, input impedance are computed. Also VSWR is computed and measured. It is found that the antennas studied have satisfying broadband characteristics.

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