摘要
该设计结合科研实际需求,研制了工作在C频段的“推扫式”卫星扫描天线。首先,从“推扫式”卫星扫描天线的原理出发,对所需要的环焦反射面进行了优化建模,提出一种新型扇形反射面圆角化的方案,并针对密集馈源阵进行分析。通过计算得到了馈源的位置坐标,在仿真软件GRASP中构造反射面天线的整体模型。为了使密集馈源阵的主波束满足设计指标,设计了遗传算法优化合成后的波束来实现对主波束的优化,通过改变馈源阵的幅相值以达到天线方向图的设计要求,利用仿真优化得到了C频段中心波束达到设计指标所需要的馈源阵规模。最后,对整体模型进行了加工组装。使用近场测量的方法在微波暗室中对天线进行测试,测试结果表明天线波束宽度为0.6°时,主波束效率为98.17%,大于98%,满足设计要求。
According to the actual demand of scientific research,a"push sweep"satellite scanning antenna working in C-band is developed in this design.Firstly,based on the principle of"push sweep"satellite scanning antenna,the model of the required circumfocal reflector is optimized,a new type of circular corner reflector is proposed,and the dense feed array is analyzed.The position coordinates of the feed source are obtained through calculation,and the overall model of the reflector antenna is constructed in GRASP.In order to make the main beam of the dense feed array meet the design criteria,the genetic algorithm is designed to optimize the main beam,and the antenna pattern is designed by changing the amplitude and phase values of the feed array.The feed array size of C-band center beam is obtained by simulation and optimization.The test results show that when the antenna beam width is 0.6°,the main beam efficiency is 98.17%,greater than 98%,which meets the design requirements.
作者
牛广群
栗曦
李一楠
NIU Guangqun;LI Xi;LI Yinan(School of Electronic Engineering of Xidian University,Xi’an 710071,China;China Academy of Space Technology(Xi’an),Xi’an 710000,China)
出处
《空间电子技术》
2024年第2期66-71,共6页
Space Electronic Technology
基金
国家民用航天十四五预先研究项目(编号:D040202)。
关键词
C频段
推扫式
环焦抛物面
C-band
push-sweep type
ring-focus paraboloid
