偏置反射面天线的机电耦合建模与分析  

Electromechanical coupling modeling and analysis of offset reflector antenna

作　　者：王从思[1] 李兆[1] 康明魁[1] 徐慧娟[1] 王伟[1] 普涛[1] 宋正梅 李江江[1] 

机构地区：[1]西安电子科技大学电子装备结构设计教育部重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2014年第2期214-219,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(50805111;51035006;51205301);新世纪优秀人才支持计划(NCET-09-0633);中央高校基本科研业务费专项资金(K50410040001;K50510040008;72103389);高等学校博士学科点专项科研基金(20120203110012);高等学校学科创新引智计划(B14042)资助课题

摘　　要：随着偏置反射面天线向高频段、低副瓣以及轻重量的方向发展,对其结构设计和制造工艺提出了更高的要求,因此,需要研究偏置反射面天线的机电耦合问题,找出影响天线电性能的主要结构因素,从而有效降低对结构设计与加工精度的要求,进而降低成本。应用口径场法,考虑反射面表面误差和馈源误差等结构因素,建立了偏置反射面天线的机电耦合模型。通过对太阳辐射下某2.6m星载偏置反射面天线的机电耦合分析结果与电磁分析软件FEKO的仿真结果进行对比,证明了所提方法的准确性和有效性。With the development of offset reflector antenna with high performance, the growing demands for high frequency, low sidelobe level and reduced mass have brought structural design and manufacturing process stringent reqnirements. The electromechanical coupling problem of offset reflector antenna is studied to find out the prime structural factors which have a great effect on electromagnetic performances, reducing the re- quirements of structural design and machining precision effectively to decrease the cost. Considering the struc- tural factors such as the reflector surface errors and the feed errors, the electromeehanical coupling model of the offset reflector antenna is discussed and developed by using the aperture field method. By comparing the coup- ling analysis results and FEKO simulation results of the electromagnetic performance of a 2.6 m spacehorne off set antenna with surface thermal distortions caused by solar radiation show the proposed coupling model is effec tive and of potential engineering value.

关 键 词：偏置反射面天线 机电耦合 结构误差 表面变形 

分 类 号：TN823.27[电子电信—信息与通信工程]