耐大功率电磁照射的大型地面雷达天线罩性能分析

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Performance analysis of large ground-based radomes under high-power electromagnetic irradiation

ZHAO Guangrui 1∗ ，YU Fubin’，DAN Yinghao²，KANG Lili 1 ，WANG Xingyil （1.Harbin top frp composite Co.，Ltd.，Harbin 150028; 2.Unit 63891，Luoyang 471000）

Abstract：Radomeserves as protectiveenclosures forradar antennas，efectivelyshielding theequipmentfrom environmentalinterferenceanddamage.Withtheevolutionofmodernbatlefieldenvironmentsandoperationalrequirements，thefunctional demands on radome has become increasinglydiverse.Beyond wave-transmision performance，capabilities such as stealth and high-power tolerance have gained critical importance.When subjected to high-power electromagnetic microwaveirradiation，the molecularpolarizationwithincompositematerials induces high-frequencyoscilations，leading tolocalizedheating.Thiscausesstructural deformationandcompromises stability.If temperatures exceed the material’sthermal limit，risks of ablationorcombustionarise.Currentsolutions toenhanceradomepower tolerance primarilyfocusonmaterial research，selectinglow-dielectric-lossandhigh-temperature-resistantmaterials.Whilepractical，thisapproachlacksthe retical guidance，andexperimentalresultsremainproject-specific，requiringrevalidationforaltereddesignconditions.This studyemploys theoreticalanalysis，designevaluation，andsimulationmodeling tocomparativelyassessthepowerandling capabilities of large spatial trussradomes with varying configurations under high-power electromagnetic irradiation.It accounts for environmental factors （e.g.，thermalconvection）andtheimpactof temperatureriseonmaterial dielectricproperties.Byimplementing abidirectionallcoupled simulation mechanism，theanalysisachieves higheraccuracy.This framework enablesprecisedesignevaluationforpractical projects，providingreliableassessmentcriteriaandfeasibilityrecommendations.The work ofers significant theoretical and practical value in radome engineering. Keywords：radome; high-power tolerance; electrical performance; power density

1引言

天线罩是集电气性能、结构强度、刚度和特殊功能要求于一体的功能结构件，其主要作用是在保证天线射频性能指标的前提下，防止大风、盐雾、暴雨、冰雹等因素对天线的影响和破坏，延长使用寿命、提高可靠性、保证天线全天候工作。（剩余2906字）