射频微波与太赫兹Jun.,20232023年6月RESEARCH&PROGRESSOFSSEVol.43,No.3第43卷第3期与进展子学研究固体电大扫描角度下具有极化不敏感特性的超宽带频率选择吸收体王哲飞张晋滔曾庆生?孙冬娇宋明歆3("南京信息工程大学电子与信息工程学院,南京,210044)(²南京航天航空大学航天学院,南京,210016)("海南大学应用技术学院,海南,詹州,571737)2022-10-17收稿,2023-03-16收改稿摘要:提出了一款具有斜人射稳定特性的超宽带极化不敏感人工电磁吸收结构,与传统结构相比,随着入射角的增大,吸收性能恶化程度大大降低。为了获得宽带和极化不敏感的吸收特性,通过采用两层混合电磁谐振模式的周期结构有耗层与一层反射底板组成的三层吸收结构,设计了电磁波斜入射时最佳的阻抗匹配行为,并利用等效电路模型分析了结构的工作机理。结果表明,该吸收体在60°人射角下仍具有稳定的吸波性能,吸收带宽达到了143.2%,而且在不同极化人射下得到了几乎一致的频率响应。关键词:人工电磁吸收结构;大入射角度;极化不敏感;超宽带中图分类号:TM25文献标识码:A文章编号:1000-3819(2023)03-0241-06Ultra-wideBandFrequency-selectiveAbsorberFeaturingPolariza-tionInsensitivityAbsorptiveResponseunderLargeIncidentAngleWANGZhefeilZHANGJintao'ZENGQingshengSUNDongjiao'SONGMingxin3('SchoolofElectronicsandInformationEngineering,NanjingUniversityofInformationEngineering,Nanjing,210044,CHN)(2SchoolofAstronautics,NanjingUniversityofAeronauticsandAstronautics,Nanjing,210016,CHN)(3CollegeofAppliedTechnology,HainanUniversity,Danzhou,Hainan,571737,CHN)Abstract:Inthispaper,anultra-broadbandpolarization-insensitiveartificialelectromagneticab-sorbingstructurewithobliqueincidencestabilitywasproposed.Comparedwiththetraditionalstruc-ture,thedeteriorationoftheabsorptionperformancewasgreatlyreducedwiththeincreaseoftheinci-dentangle.Inordertoobtainbroadbandandpolarization-insensitiveabsorptioncharacteristics,thebestimpedancematchingbehaviorunderobliqueincidenceofelectromagneticwaveswasdesignedbyusingathree-layerabsorptionstructureconsistingoftwolayersofperiodicstructurelossylayerswithmixedelectromagneticresonancemodesandareflectivebackplane,andusingtheequivalentcircuitmodeltoan...