缝隙耦合结构反射阵天线单元的设计

平面反射阵天线具有易于折叠、携带方便的特点,结合缝隙耦合单元结构频带较宽的优势,能弥补常见平面反射阵天线带宽窄的不足。文章通过分析缝隙耦合单元的S参数和反射相位曲线,给出了缝隙耦合反射阵单元的详细设计参数。仿真表明该单元作为独立天线时有14.9%的阻抗带宽,用其组成36个单元的小型反射阵,该阵列有16%的-1dB增益带宽,具有良好的工作性能。

Design of Reflectarray Antenna Element Based on Aperture-Coupled Patch

Because of the characteristics of being easily folded and portable,the flat reflectarray antenna,combined with the advantage of broadband of aperture-coupled element,can recuperate the narrow band of the common flat reflectarray antenna.The S parameter and the reflection phase curve of aperture-coupled elements are analyzed in this paper.According to the analysis,the detailed design parameters of aperture-coupled reflectarray element are proposed.The result shows that 14.9% impedance bandwidth is obtained when the element is regarded as an independent antenna.There is 16%-1 dB bandwidth of gain when 36 elements reflectarray is built,furthermore,it can provide good performance in this case.