石墨烯材料在天线方向图重构实验教学中的应用

Application of Graphene Material in Antenna Pattern Reconstruction Experiment Teaching

本文提出了将石墨烯材料引入到微带—八木天线上重构天线辐射方向图的实验教学构想。金属微带—八木天线由一个辐射单元和三个引向单元组成,而石墨烯被设计成圆环结构加载到引向单元上。利用CST软件仿真发现:调节石墨烯化学势能够改变引向单元的等效面积,进而改变天线的辐射方向;截断天线底部金属板可大幅增加波束指向的动态范围。通过该实验,说明微带—八木天线辐射方向与引向器的面积、底部金属板长度直接相关,加深了学生对方向图影响因素的认知。科学研究热点材料石墨烯的引入使得天线方向图不再“静止”,这不但提高了天线实验课程的趣味性,而且增强了学生对科学研究的探索欲望。

An experimental teaching idea of reconstructing the radiation pattern of antenna is proposed by introducing the graphene material into the microstrip-Yagi antenna.This antenna consists of one radiating unit and three guiding ones,while the graphene is designed as the ring structures to be loaded on the guiding units.It is found by the CST simulation that adjusting the chemical potential of graphene can change the equivalent area of guiding units and then the radiation direction of the antenna.And cutting off the metal plate below can increase greatly the dynamic range of beam pointing.This experiment displays that the radiation direction of microstrip-Yagi antenna is directly related to the area of guiding units and the length of the bottom metal plate,which deepens the students’understanding about the influence factors of the pattern.The introduction of graphene,a hot material in scientific research,makes the antenna pattern no longer'static',which not only improves the interest of antenna experiment course,but also enhances the students'desire.