利用加载技术设计对数周期天线及其结果分析

为实现对数周期天线（LPDA）小型化,顶端电容加载了LPDA的偶极子,通过对加载电容偶极子的仿真实验,分析了其各个参数对天线性能的影响。并以此为依据,给出了工作频率在200MHz~600MHz的,以加载电容偶极子为基本单元设计的LPDA模型,由仿真结果可知,各项性能指标良好,而且天线尺寸有了明显的减小,为宽带小型化天线提供了一种设计思路。

Design and Analysis of the Loop Log Periodic Antenna with Loaded Technology

To realize the miniaturization of the loop log-periodic antenna,the dipoles of LPDA are loaded with capacitance in the top.The influence to the performance of the antenna is analysed across the optimized experiment of the capacitanceloaded dipoles.And according to analysis above,capacitance-loaded dipoles are adopted as the elements of the loop log-periodic antenna which is optimized by the soft CST.The result shows that both the gain and VSWR have good properties.compared to the traditional LPDA,this design apparently leads to a size-reduction,and miniaturization of LPDA comes ture.