星载宽波束天线结构设计和正弦振动分析  

Mechanical Design and Sinusoidal Vibration Analysis of Satellite Wide-beam Antenna

作　　者：杨亚军 李增科 解磊[1] 孙立杰[1] 牛耕 赵航 YANG Yajun;LI Zengke;XIE Lei;SUN Lijie;NIU Geng;ZHAO Hang(The 54th Research Institute of CETC,Shijiazhuang 050081,China;Hebei Branch,China Communications System Co.,Ltd.,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]中华通信系统有限责任公司河北分公司,河北石家庄050081

出　　处：《无线电工程》2021年第7期663-667,共5页Radio Engineering

基　　金：国家部委基金资助项目。

摘　　要：针对低轨星座发展对宽波束天线的需求,对天线的结构布局和装配精度分析进行了简要介绍。在建立的有限元模型基础上,对天线进行了模态分析和正弦振动仿真。提出了求解天线多自由度系统正弦激励响应的模态叠加法矩阵方程及各阶振型对应的模态阻尼比计算方法。在天线试验的基础上,进行了接口精度和电气增益测试,验证结果显示,天线可抵抗火箭升空过程的低频正弦振动和满足入轨之后的宽波束通信。According to the requirements of LEO constellation development for wide-beam antenna,the structure layout and assembly accuracy analysis of antenna are briefly introduced.Based on the established finite element model,modal analysis and sinusoidal vibration simulation of the antenna are performed.The matrix equation of mode superposition method and the calculation method of damping ratio are proposed to solve the sinusoidal excitation response of antenna multi-degree of freedom system.Based on the antenna test,the interface accuracy and antenna gain are tested,and the results show that the antenna can resist the low-frequency sinusoidal vibration caused by rocket launching and meet the wide-beam communication requirement after entering orbit.

关 键 词：星载天线 结构设计 正弦振动 仿真 试验 

分 类 号：TN927.2[电子电信—通信与信息系统]