一种极化复用的聚焦惠更斯超表面设计郝宏刚①②冉雪红①郑森①唐逸豪①阮巍*①①(重庆邮电大学光电工程学院重庆400065)②(重庆邮电大学高等科学研究院重庆400065)摘要：针对无源超表面功能单一的问题，该文提出一款极化复用的透射型惠更斯超表面，可实现x极化和y极化入射波的独立聚焦特性。超表面单元由一层厚度为0.17λ的介质基板和位于两侧的不对称电偶极子元件组成，利用反向流动的表面电流构成磁偶极子，在物理结构上消除了磁性元件的需求，使单元更加紧凑。通过单元结构尺寸的调整，实现双极化独立调控和360°相位覆盖。根据双极化聚焦的效果设定，基于全息理论对单元进行排列，设计并制备出在35GHz下具有独立聚焦特性的极化复用惠更斯超表面，模拟和实测结果基本一致。所提出的惠更斯超表面无多层堆叠和金属过孔，具有结构简单、低剖面、易加工等特点。关键词：惠更斯超表面；极化复用；聚焦；全息理论中图分类号：TN82文献标识码：A文章编号：1009-5896(2023)04-1330-08DOI:10.11999/JEIT220067DesignofaPolarizationMultiplexedFocusedHuygensMetasurfaceHAOHonggang①②RANXuehong①ZHENGSen①TANGYihao①RUANWei①①(CollegeofPhotoelectronicEngineering,ChongqingUniversityofPostsandTelecommunications,Chongqing400065,China)②(InstituteforAdvancedSciences,ChongqingUniversityofPostsandTelecommunications,Chongqing400065,China)Abstract:Inordertosolvetheproblemofsinglefunctionofpassivemetasurface,apolarizationmultiplexedtransmissionHuygensmetasurfaceisproposed,whichrealizestheindependentfocusingcharacteristicsofx-polarizedandy-polarizedincidentwaves.Themetasurfaceunitconsistsofapairofasymmetricalelectricdipoleelementsandadielectricsubstratewithathicknessof0.17λ.Magneticdipoleisformedbysurfacecurrentflowinginreversedirection,whicheliminatestheneedformagneticelementinphysicalstructureandmakestheunitmorecompact.Dual-polarizationindependentcontroland360°phasecoverageareachievedbyadjustingthedimensionsofunit.AligningHuygensparticlesbasedonholographictheory,apolarizationmultiplexedHuygensmetasurfacewithindependentfocusingcharacteristicsat35GHzisdesignedandfabricated.Themeasuredresultsarebasicallyconsistentwiththesimulations.TheproposedHuygensmetasurf...
