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分别将创新设计的“四方形”超材料单元和周期条形缝隙蚀刻在普通微带天线的辐射贴片和接地板上,设计了工作在3.67~14.17 GHz的一种小型化宽带高增益微带天线。与原始的天线相比,新型天线的谐振中心频率降低了44.8%,相对带宽从2.7%扩展到243.1%,同时保持了良好的增益。实物测试结果与仿真结果吻合较好。因为超材料的左手传输特性影响了微带天线介质基板的等效媒质参数,导致天线的辐射场主要集中在水平方向,而不是传统的微带天线的垂直方向。
The innovatively designed “quadrilateral” metamaterial unit and periodic stripe slit are respectively etched on the radiating patch and the ground plane of a common microstrip antenna, and a miniaturized broadband high-gain operating at 3.67-14.17 GHz is designed Microstrip antenna. Compared to the original antenna, the new antenna’s resonant center frequency is reduced by 44.8% and the relative bandwidth is extended from 2.7% to 243.1% while maintaining good gain. The physical test results are in good agreement with the simulation results. Because the left-handed transmission characteristics of metamaterials affect the equivalent medium parameters of the microstrip antenna substrate, the radiation field of the antenna is mainly concentrated in the horizontal direction rather than in the vertical direction of the traditional microstrip antenna.