毫米波赋形聚焦双反射面天线设计  

Design of shaped millimeter wave focus antenna with dual-reflector

作　　者：薛长江[1] 余川[2] 屈劲[2] 施美友[2] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900 [2]中国工程物理研究院应用电子学研究所,高功率微波技术重点实验室,四川绵阳621900

出　　处：《强激光与粒子束》2016年第8期53-57,共5页High Power Laser and Particle Beams

基　　金：国家科技支撑计划资助课题(2012BAK06B06)

摘　　要：为实现一种具有近场聚焦、斜波束出射能力的偏馈口径天线,采用几何光学方法设计了一种赋形聚焦双反射面天线。基于光线传播的能量守恒定律、Snell定律及光径长度相等三个光学定律开展了天线主反射面赋形设计,副反射面的设计采用Snell定理作为约束条件。通过理论公式和实验测试研究,实现了一种出射波束口径为110cm、波束出射方向与竖直方向成20°夹角的赋形聚焦偏馈双反射面天线。在中心频率95GHz下,实测相位实现近场聚焦,出射波束与垂直方向成20°夹角。A shaped scheme based on geometric optics for offset-fed dual-reflector focus antenna is presented.The main reflector is a shaped antenna based on conservation of energy along a ray tube,Snell＇s law,uniform phase and equal path length.Only Snell＇s law is imposed on the sub-reflector.Based on this design solution,theoretical analysis,numerical simulation and experimental test are carried out for a 110 cm dish baseline system with an angle of 20°between xaxis and the beam.The experiment shows that at 95 GHz,the antenna has a well focusing through phase measurement with an angle of 20°between xaxis and the beam.

关 键 词：聚焦天线 双反射面天线 几何光学 赋形天线 

分 类 号：TN820[电子电信—信息与通信工程]