超表面宽带天线的仿真与设计

Simulation and Design of Broadband Antenna Based on Metasurface

仿真设计了一款基于超表面的宽带贴片天线,通过在矩形辐射贴片上刻蚀“工”字型缝隙展宽了天线的带宽,在不改变天线尺寸和工作频段的基础上,距离天线介质基板为H的正上方加载了5×5正方形单元结构组成的单层超表面,改善了天线的阻抗匹配,提高了天线的增益。仿真结果显示,该天线的工作频段为4.7~7.9 GHz,带宽为3.2 GHz,实现了宽带化,在工作频段内辐射方向稳定,最大增益达到了6.83 dBi。

A broadband patch antenna based on the metasurface is designed by simulation.The characteristics of broadband are achieved by etching"工"type slots on the rectangular radiation patch.On the basis of not changing the antenna size and working frequency band,a single-layer metasurface composed of 5×5 square cell structure is loaded directly above the antenna medium substrate for H,which improves the impedance matching of the antenna and improves the gain of the antenna.The simulation results show it can operate from 4.7 GHz to 7.9 GHz,and the bandwidth is 3.2 GHz,the broadband is realized.The radiation direction is stable in the working frequency band,with a maximum gain of 6.83 dBi.