低旁瓣波束扫描反射阵天线设计  

Design of Low Side-Lobe Beam-Scanning Reflectarray Antennas

作　　者：陈宏伟[1] 张广求[1] 雷雪[1] 吴君默 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2015年第2期162-165,171,共5页Journal of Information Engineering University

摘　　要：针对传统基于移动馈源所设计的波束扫描反射阵天线在扫描过程中旁瓣恶化严重,增益损失大的问题,提出了基于双焦点口径面相位分布,沿圆弧型路径移动馈源的设计方法;设计了中心频率为12GHz,阵元数为21×21的反射阵天线。仿真结果表明,相比传统设计方法,整个扫描过程增益损失减小2.6d B,最大扫描角度上旁瓣降低3.7d B,其它扫描角度上旁瓣也均有改善。For the beam-scanning reflectarray antenna designed by the traditional moving feed methods, the side lobe levels worsen seriously, and gain loss is high in the scanning process. This paper proposes a new method in which the aperture phase distribution is determined by the bifocal point, and the feed moves in an arc-shaped route. It also presents a design of a reflectarray antenna which has a center frequency of 12GHz and a size of 21 ~ 21. The simulation results show that, compared to the traditional design method,the proposed design reduces the gain loss by 2.6dB and the side lobe level by 3.7dB in the maximum direction, and the side lobe levels in other directions are also decreased.

关 键 词：波束扫描 反射阵 移动路径 双焦点 

分 类 号：TN82[电子电信—信息与通信工程]