球形反射面天线球差消除及偏馈技术研究  

Research on Elimination of Spherical Reflector Antenna Aberration and Offsetting Technology

作　　者：南冰[1] 李正军[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2016年第3期37-40,共4页Space Electronic Technology

摘　　要：针对传统抛物面天线偏焦性能差加工难度高的问题,文章提出了以球面作为主反射面通过赋形副反射面消除球面相差的方案。由于球面完全对称的结构,从而可以通过主反射面不动旋转馈源的方式实现宽角扫描,仿真结果表明在正馈情况下球形反射面天线副反射面对口径遮挡较大,使得副瓣电平过高,最后通过偏馈的办法,有效的降低了副瓣电平。Traditional parabolic antenna performs poorly in the condition of axial offset and is hard to manufacture. In this paper we take spherical surface as main reflector and use sub-reflector to correct the aberration of spherical surface. Due to the unique geometric properties of the sphere,spherical reflector antenna has great benefit to reduce the cost and practice the wide-angle scanning antenna without main reflector spinning. The simulation result shows that the sidelobe level is relatively high because of the block of sub-reflector,while the proposed offset spherical reflector reduces the sidelobe radiation effectively.

关 键 词：球形反射面天线 副面赋形 球差补偿 偏置球面 

分 类 号：TN823.27[电子电信—信息与通信工程]