摘要
随着反射面天线不断向高频段、高增益、高性能的方向发展,其结构和电磁不确定性对天线增益和指向精度等电性能的遏制作用也愈发明显,大大限制了反射面天线探测范围与指向精度等性能的提升。文中以反射面天线为对象,建立了反射面天线结构不确定性机电耦合模型,基于区间分析方法给出了主反射面形面不确定性下的方向图表达式。通过110 m天线设计模型算例,讨论了馈源和主反射面不确定性对天线增益、指向等性能的影响机理。结果表明:馈源位置不确定性对天线副瓣电平和增益损失的影响比馈源指向不确定性的影响大;与外环面板相比,主反射面内环面板形面不确定性对电性能的影响更大。
As reflector antennas continue to evolve towards higher gain and performance in the high-frequency range,the constraints posed by their structure and electromagnetic uncertainty on electrical properties like antenna gain and pointing accuracy are becoming increasingly evident,which significantly restricts the enhancement of reflector antennas’detection range and pointing accuracy.In this paper reflector antennas are taken as the object,an electromechanical coupling model is established for the structural uncertainty of reflector antennas.Based on interval analysis method,the directional pattern expression under the uncertainty of the main reflection surface shape is provided.Finally,the influence mechanism of feed source and main reflector uncertainty on antenna gain,pointing direction and other performance is discussed through an example of a 110 m antenna design model.The results show that the uncertainty of the feed source position has a greater impact on the sidelobe level and gain loss of the antenna than the uncertainty of the feed source pointing direction.The uncertainty of the inner ring panel shape of the main reflector has a greater impact on the electrical performance than that of the outer ring panel.
作者
严粤飞
王宗清
王文娟
许谦
伍洋
肖松
李智
王飞朝
王从思
YAN Yuefei;WANG Zongqing;WANG Wenjuan;XU Qian;WU Yang;XIAO Song;LI Zhi;WANG Feichao;WANG Congsi(Guangzhou Institute of Technology,Xidian University,Guangzhou 510555,China;State Key Laboratory of Electromechanical Integrated Manufacturing of High-Performance Electronic Equipments,Xidian University,Xi’an 710071,China;School of Mechano-Electronic Engineering,Xidian University,Xi’an 710071,China;Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China;Xi’an Electronic Engineering Research Institute,Xi’an 710100,China)
出处
《电子机械工程》
2025年第1期1-6,20,共7页
Electro-Mechanical Engineering
基金
国家重点研发计划(2021YFC2203600)
国家自然科学基金资助项目(52275269,U23A6017)
陕西省秦创原“科学家+工程师”队伍建设计划项目(2022KXJ-030)。
关键词
反射面天线
不确定性
区间分析
耦合模型
reflector antenna
uncertainty
interval analysis
coupling model
作者简介
严粤飞,男,1995年生,准聘副教授、讲师,主要从事电子感知机电热耦合研究;王宗清,男,2001年生,硕士研究生,主要从事电子装备机电热耦合分析研究。
