一种短波鞭状宽带天线的设计

一种短波鞭状宽带天线的设计

内容简介：设计了一种短波鞭状宽带天线，天线体高度为10 m，直径为10 cm，利用FEKO电磁仿真软件建立了仿真模型。通过对天线体进行两点集总元件加载来改善天线低频段阻抗特性，利用遗传算法优化了加载点和加载位置，并在天线馈电端运用改进实频法进行匹配网络设计，使得天线在3~30 MHz频段内阻抗平稳。计算了天线的驻波比、增益和效率，并实际制作了一副天线进行了测试，实测天线驻波比和仿真计算结果相吻合，最大驻波比不超过2.8，可以和宽带发射机良好匹配，实现了天线的宽带化。

Abstract：A shortwave whip-shaped broadband antenna was designed,whose height is 10 m and diameter is 10 cm. A sim-ulation model was established with electromagnetic simulation software FEKO. The low-frequency band impedance characteristics of the antenna was improved by loading of the two-point lumped elements of the antenna body. The loading point and loading po-sition was optimized with genetic algorithm. The matching network design was implemented by using the improved real frequency method at the antenna feed end to make the antenna impedance stable in the range of 3~30 MHz. The antenna standing wave ra-tio,gain and efficiency were calculated. The antenna was made and tested. The measured antenna standing wave ratio is coinci-dent with the simulation calculation result. Its maximum standing wave ratio is no more than 2.8,which can match with the broadband transmitter. A broadband antenna was realized by the design.

作者：弓永明, 蔡志远, 马银圣, 刘浩鑫,

关键词：鞭状宽带天线, 集总元件加载, 匹配网络, 仿真模型,