三角环对数周期天线的设计及分析

Design and Analysis of Triangle Loop Log-periodic Antenna

利用对数周期天线设计的基本理论和电磁场数值计算方法,结合三角偶极子天线的特性,以三角环为基本振子单元,设计工作频率在150 MHz^600 MHz的三角环对数周期天线,并利用CST软件进行建模、仿真、分析和优化。仿真结果显示,三角环对数周期天线在工作带宽内具有理想的增益和驻波比。同时,其结构尺寸是对数周期偶极子天线的一半,实现了天线的小型化。

In this paper,a triangle loop is adopted as the elements of the triangle loop log-periodic antenna connecting triangle dipole antenna,which are analyzed according to the basic theory of LPDA and the calculational methods in electromagnetics.The model of the antenna is designed,annalyzed and optimized by the soft CST for 150 MHz ~600 MHz.The result shows that both the gain and bandwidth have good properties.This design apparently leads to a size-reduction of more than 50%compared to the traditional LPDA,and miniaturization of LPDA comes ture.