新型电磁材料结构的微带天线设计

摘要

A meta-material structure which is optimized by combining genetic algorithm in Matlab and simulation in HFSS is introduced.A structure which has surface wave band gap is designed to suppress surface wave,as well as enhance gain performance.The optimization process of the algorithm is effectively accelerated by saving and querying the optimized records.Through simulation results,it is found that the microstrip antenna with the structure of new electromagnetic material,work on 5.8 GHz,gain is increased by 1.8 dB,and back radiation is reduced by 3.8 dB,and electromagnetic signal acquisition ability of antenna is improved.%使用基于Matlab的遗传算法程序结合HFSS仿真,设计了一种具有表面波带隙特性的新型电磁材料结构,将其用于微带天线能够抑制表面波、提升增益.对优化记录进行保存和查询,有效地加快了算法优化进程.通过仿真对比表明:添加该新型电磁材料结构后的微带天线工作在5.8 GHz时,增益提升1.8dB,背瓣降低3.8dB,提升了天线对电磁信号的采集能力.