基于石墨烯器件和大带宽频率选择表面的分析

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1、AbstractInrecentyears，ascompetitioninthewirelesscommunications，communicationdevelopsinthedirectionofmulti—band，broadband,Thedemandforcommunicationdeviceiscapableofversatileworkincreases．Moreover，therapiddevelopmentofwirelesscommunicationtechnology,modernwi

2、relesscommunicationsystemshasbeenputhigherrequirements．Multi-band，multi-functionwirelessdevicesbecomepopularforscholarsathomeandabroad．Thispaperdescribesbackgroundandstatusofdevelopmentathomeandabroadofthegraphenedevicesandku-bandfrequencyselectivesurface．

3、Thenintroducedthetheoreticalbasisofthispaper．First,westudythegrapheneconductivitymodel，andderiveprinciplesofrecontigurableconductivityofgraphene．Thenstudythemicrostrippatchantennatheory,whichisthetheoreticalbasisfortheTHzgraphenemicrostrippatchantenna．Fina

4、ll5westudythesplitringresonatortheorywithequivalentcircuitanditsequivalentcircuitofcomplementaryStructure．Thispaperproposesadipoleantennabasedongrapheneanditsantennaarray．Byadjustingtheconductivityofgrapheme，wecanachievereconfigurablefrequencyandachieveano

5、velTHzantennawhichhasaswitchingcharacteristic．Thegainofgraphenedipolearrayantennacanbeachievedtunable．Thenstudyasinglemicrostrippatchantennabasedongrapheneanditsarrayantennatoachieveareconfigurablefrequencyandgain．Wealsostudyfractalpatchantennabasedongraph

6、eme．Weusetheimpedancesurfaceofthegraphenegivenbythetheoryofconductivityofgraphemetoresearchongraphenefractalantenna．FinallyweresearchonthegrapheneFSSinmicrowaverangewithusingsurfaceimpedancemethod．Ithasreconfigurableabsorptionintensity．ChapterIVshowsfreque

7、ncyselectivesurfaceswithdifferentstructures(FSS)inku-band．Firstwerise@litringresonator(SRR)andcomplementarysplitringresonator(CSRR)tomakeband-stopandband-passfrequencyselectivesurface．Andwestudytheeffectofline-width,dielectricconstant,substratethicknessand

8、numberoflayersonband-width．12-15GHzpassbandfrequencyselectivesurfacesweredesignedwiththestructureofCSRR．ThenstudyinfluenceofIIIAbStractdifferentstructuralparametersonband-widthandresonancepoint．Themeasuredres