摘要
提出一种基于反射阵技术的平面型副反射面设计方法。根据双反射面天线的焦点变换关系,得到了平面型副反射面的相位补偿规律。采用开口环形单元设计了一种平面型副反射面,将初级馈源±20°的入射波束转化为照射角为±35°的散射波束。仿真对比了散射波束照射天线主面的口径效率。采用所设计的平面型副反射面,天线口径效率达到61.14%,与金属副面64.02%的口径效率相差无几。平面型副反射面采用印制板工艺制作,具有精度高和成本低的技术优势。
This paper presents the design on a flat sub-reflector based on reflectarray technique.The required phase compensation is obtained by studying the focal distance relation.A flat sub-reflector composed of split-ring elements is designed to convert the primary feed beam with ±20°radiation angle into scattered beam with ±35° radiation angle. The aperture efficiencies of the main reflector illuminated by the scattered beams are simulated and compared.It is found that the aperture efficiency reaches 61.14% when the flat sub-reflector is used,which is very close to the aperture efficiency of 64.02% when metallic sub-reflector is used.The flat sub-reflector can be fabricated with standard planar circuit board technique, which has the advantages of high precision and low cost.
作者
武彦飞
何应然
张文静
WU Yan-fei HE Ying-ran ZHANG Wen-jing(The 54th Research Institute of CETC, Shijiazhuang Hebei 050081, China)
出处
《无线电通信技术》
2017年第1期77-80,共4页
Radio Communications Technology
基金
河北省应用基础研究计划重点基础研究项目(16960404D)
关键词
平面反射阵
副反射面
相位补偿
波束整形
flat reflectarray
sub-reflector
phase compensation
beam conversion
