星载SAR缝隙波导天线环境适应性设计与验证王志刚，陈梁玉，张先锋，姚雨帆（中国电子科技集团公司第三十八研究所，合肥230088）摘要：针对星载合成孔径雷达（SAR）长寿命、高可靠的需求，从天线的类型选择、构型设计和实现途径等方面介绍了某大型星载SAR平面相控阵天线的技术路线，确定采用真空钎焊技术的整块缝隙波导天线为研究对象；从机电热全面分析其在空间力学环境、热环境、真空环境和带电粒子辐射环境下的适应性设计关键技术和难点，如：通过合理减重、结构分块和布局优化等设计，解决天线的刚强度问题；对天线全流程工艺进行控制以获得满足热控要求的阳极氧化膜；采用游离设计减小天线在高低温环境下的热变形；通过合理确定电场最强处两个金属面的间距来消减天线在真空环境下的微放电现象；通过选择聚酰亚胺材料作为射频连接器的介质支撑来提高天线的抗辐射能力。环境试验和在轨验证结果证明，该缝隙波导天线设计合理，环境适应性良好，能够稳定正常工作。关键词：星载天线；合成孔径雷达；缝隙波导天线；航天器环境；环境适应性设计；试验验证中图分类号：TN823文献标志码：A文章编号：1673-1379(2023)01-0092-07DOI:10.12126/see.2022106EnvironmentaladaptabilitydesignandverificationofslotwaveguideantennaforspaceborneSARWANGZhigang,CHENLiangyu,ZHANGXianfeng,YAOYufan(The38thResearchInstituteofChinaElectronicsTechnologyGroupCorporation,Hefei230088,China)Abstract:Inordertomeettherequirementsoflong-lifeandhighreliabilityofspacebornesyntheticapertureradar(SAR),thetechnicalrouteofalargeplanarphasedarrayantennaforspaceborneSARwasintroducedfromtheaspectsofantennatypeselection,configurationdesignandimplementationapproach.Thewholeslotwaveguideantennausingvacuumbrazingwasselectedastheresearchobject.Thekeytechnologiesanddifficultpointsoftheadaptivedesigninmechanical,thermalradiation,highandlowtemperature,vacuumandspaceradiationenvironmentswerecomprehensivelyanalyzedfrommechanical,electricalandthermalperspectives.Forexample,therigidityandstrengthoftheantennaweresolvedthroughthedesignsofreasonableweightreduction,structuralpartitioningandlayoutoptimization.Theanodizedfilmthatmeetsthethermalcontrolrequirementwasobtainedthroughthewholeprocesscontroloftheante...
