一种高效率高增益PCM圆极化天线设计

Design of PCM circular polarization antenna with high efficiency and high gain

针对现行极化转换超表面孔径效率不高及增益改善不足等问题,设计了一种应用于X/Ku波段的高效率接收-传输型超表面天线.设计的天线接收层为高反射率的矩形贴片,传输层为十字交叉缝隙,辐射层是以12×12单元排布的斜缝隙矩形贴片.通过调整馈源天线金属地板与超表面接收层构成了FP谐振腔空气层的高度,提高了同相反射增益.仿真结果表明,设计的天线峰值增益达到了14.8 dBic,圆极化带宽为12.3~12.6 GHz,实现了良好的圆极化辐射性能;与其他类型的FP谐振腔天线相比,该超表面天线具有高增益、圆极化、高效率辐射特性.

The current polarization conversion metasurface aperture efficiency is not high and gain improvement is insufficient.Aiming at this problem and others like it,this paper designs a high efficiency receiving-transmission metasurface antenna used for X/Ku band.The antenna receiving layer is a rectangular patch with high reflectivity;the transmission layer is a cross slit,and the radiation layer is a rectangular patch with inclined slit arranged with 12×12 units.By adjusting the metal floor of the fed antenna and metasurface receiving layer,the height of the FP cavity air layer is constructed,thus improving the in-phase reflection gain.The simulation results are shown as below:the designed antenna peak gain reaches 14.8 dBic;the circular polarization bandwidth is 12.3-12.6 GHz,achieving good circular polarization radiation performance.Compared with other types of FP resonator antennas,this metasurface antenna has the characteristics of high gain,circular polarization and high-efficiency radiation.