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1、H-MRTDsimulationofdual-frequencyminiaturepatchantennaYUWen-ge1,2,ZHONGXian-xin1,LIXiao-yi1,CHENShuai1(1.TheKeyLabforOptoelectronicTechnology&SystemsofMinistryofEducation,ChongqingUniversity,Chongqing,China;2.BasicLogisticalEngineeringUniversity,Chongqing,China
2、)Abstract:AnovelMEMSdual-bandpatchantennaisdesignedusingslot-loadedandshort-circuitedsize-reductiontechniques.Bycontrollingtheshort-planewidth,f10andf30,tworesonantfrequencies,canbesignificantlyreducedandthefrequencyradio(f30/f10)istunableintherange1.7～2.3.The
3、Haar-Wavelet-Basedmultiresolutiontimedomain(H-MRTD)isusedformodelingandanalyzingtheantennaforthefirsttime.Inaddition,themathematicalformulaeareextendedtoaninhomogenousmedia.Numericalsimulationresultsarecomparedtothoseachievedusingtheconventional3-Dfinite-diffe
4、rencetime-domain(FDTD)methodandmeasured.Ithasbeendemonstratedthat,withthistechnique,spacediscretizationwithonlyafewcellsperwavelengthgivesaccurateresults,leadingtoareductionofbothmemoryrequirementsandcomputationtime.Keywords:dual-frequencyantenna;H-MRTDmethod;
5、FDTDmethod;MEMS;UPMLabsorbingboundaryconditions1 Introduction1 Recently,patchantennaresearchhasfocusedonreducingthesizeofthepatch,whichisimportantinmanycommercialandmilitaryapplications.Ithasbeenshownthattheresonantfrequencyofamicrostripantennacanbesignifican
6、tlyreducedbyintroducingaShort-circuitedplaneorapartlyshort-circuitedplanewheretheelectricfieldoftheresonantmodeiszero[1-3],orashort-pinnearthefeedprobe[4].Usingtwostackedshort-circuitedpatches,dual-frequencyoperationhasbeenobtained[5].However,theuseofastackedg
7、eometryleadstoincreasesinthethicknessandcomplexityofthepatch.Inthispaper,wedemonstratethatbyshort-circuitingthezeropotentialplaneofaslottedpatchexcitedwithadominantmode(TM10),theresonantfrequencies,f10andf30,ofthetwooperatingmodescanbeapproximatelyhalvedandcan
8、evenbesignificantlyreducedbydecreasingtheshorted-planewidth.Thisindicatesthatalargereductioninantennasizecanbeobtainedbyusingtheproposeddesign,ascomparedtothatofaregularslot-loaded
