波束扫描微带反射阵天线设计  

Design of the beam scanning microstrip reflectarray antenna

作　　者：陈宏伟[1] 张广求 雷雪[1] 吴君默 孙武剑[2] 

机构地区：[1]信息工程大学信息系统工程学院,河南郑州450002 [2]中国北方电子设备研究所,北京100876

出　　处：《西安电子科技大学学报》2015年第6期173-178,共6页Journal of Xidian University

基　　金：国家863计划资助项目(2014AA01A707)

摘　　要：以设计宽角度、低旁瓣波束扫描微带反射阵天线为目标,提出一种基于三焦点口径面相位分布的设计方法.该方法首先引入一种由三焦点确定的适于宽角度扫描的新型口径面相位分布;其次利用混合粒子群算法对该相位分布进行优化以降低方向图旁瓣;最后在优化结果的基础上,采用移动馈源技术实现天线的波束扫描.为了验证设计方法的有效性,设计加工了一副Ku波段、口径面直径为17λ0的圆极化波束扫描反射阵天线.天线仿真与实测结果吻合,在52°扫描范围内旁瓣均小于-18dB,且带宽达到10.8%(1dB增益带宽和3dB轴比带宽重叠区域).For the aim of designing a wide-angle low sidelobe beam scanning microstrip reflectarray antenna, a new design method based on a new aperture phase distribution of three focuses is proposed. This method introduces a new phase distribution determined by three focuses for wide-angle beam scanning firstly. Then the aperture phase distribution is further optimized by the hybrid particle swarm algorithm to reduce the side lobe level of the pattern. Based on the optimization, the antenna realizes beam scanning by use of a moving feed. In order to verify the effectiveness of the design method, a Ku-band circular polarized beam scanning reflectarray antenna is designed and fabricated. The measured results agree well with the simulated ones, with the side lobe level being below --18dB within the scan range of 52°and the band reaching 10.8% （the overlapping 3 dB axial-ratio （AR） and 1 dB gain bandwidth）.

关 键 词：波束扫描 反射阵 三焦点 混合粒子群算法 

分 类 号：TN820.21[电子电信—信息与通信工程]