一种Peano结构的圆极化微带天线设计

摘要

To improve the problem of antenna array circular polarization and gain degradation because of large distance between antennae with EBG structure,a design of circularly polarized microstrip antenna with Peano curve structure was proposed.After study of finite periods first order Peano curve to suppress surface wave by direct transmission method,the EBG structure was put around the antenna,the distance waaas reduced between antenna and Peano structure,and the design parameters of antenna and Peano structure were optimized.The simulated results show that the distance between circularly polarized microstrip antenna and EBG structure can be reduced as compared with the traditional antenna.Mutual coupling among antennas can be suppressed,and the performance of antenna array can be improved.%在天线结构优化设计中,为了改善电磁带隙结构下阵元间距过大造成天线阵极化特性和增益性能下降的问题,提出设计了一种Peano结构下的圆极化微带天线.使用直接传输方法分析有限周期的一阶Peano结构的表面波带隙,将电磁带隙结构放在微带天线周围,通过减小电磁带隙结构和天线的间距,优化天线结构和天线的参数,缩小阵元之间的间距.仿真结果表明,与传统的电磁带隙结构微带天线相比,改进设计能有效减小圆极化天线阵中阵元间距,抑制阵元之间的互耦,提高阵元的方向性和天线阵性能.