第39卷第1期2023年2月Electro-MechanicalEngineering·结构设计·DOI:10.19659/j.issn.1008–5300.2023.01.004星载薄膜反射阵天线机电耦合模型及其应用*张澳，李萌（中国空间技术研究院钱学森空间技术实验室，北京100094）摘要：薄膜反射阵天线面密度低、收纳比高、电设计自由度高，在实现星载天线“高增益”、“轻巧化”的要求上有巨大的优势。但目前还没有在轨使用的大口径薄膜反射阵天线，主要是因为薄膜在空间热环境、光场、电磁波辐射、粒子辐照、重力梯度等多物理场中容易产生大变形与振动，严重影响天线的电性能。为验证大口径薄膜反射阵天线在空间大规模运用的可行性，建立了薄膜反射阵天线的机电耦合模型，研究了反射阵单元误差和馈源误差对天线电性能的影响，分析了薄膜反射阵天线形变与振动对增益和副瓣电平的影响，为薄膜反射阵天线的在轨误差分析提供参考。关键词：反射阵天线；薄膜；机电耦合模型；远场方向图中图分类号：TN82文献标识码：A文章编号：1008–5300(2023)01–0027–05ElectromechanicalCouplingModelandItsApplicationforSpaceborneMembraneReflectarrayAntennasZHANGAo,LIMeng(QianXuesenLaboratoryofSpaceTechnology,ChinaAcademyofSpaceTechnology,Beijing100094,China)Abstract:Membranereflectarrayhasgreatadvantagesinrealizingtherequirementsofhighgainandlightweightforspaceborneantennas.Ithaslowarealdensity,highstowageratioandhighelectromagneticdesignfree-dom.However,thereisnolarge-aperturemembranereflectarrayantennaonorbit,sincelargedeformationandvibrationofthemembranecausedbymulti-physicalfieldssuchasspacethermalenvironment,lightfield,electromagneticradiation,particleradiation,gravitygradientwillseriouslyaffecttheelectromagneticperfor-manceoftheantenna.Inordertoverifythefeasibilityoflarge-aperturemembranereflectarrayantenna,theelectromechanicalcouplingmodelisestablished.Theinfluenceofreflectarraypatcherrorandfeederrorontheelectromagneticperformanceoftheantennaisanalyzed,andtheinfluenceofmembranedeformationandvibrationonthegainandsidelobelevelareinvestigated,whichprovidereferencefortheon-orbiterroranalysisoftheantenna.Keywords:reflectarrayantenna;membrane;electromechanicalcouplingmodel;farfielddirectionaldiagram引言星载天线...
