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1、SensorandSimulationNotesNote56616June2013ApplicationsonRing-ShapedOmni-DirectionalWaveguideAntennas12AliHousseinHarmouch,HassanSaffouhHaddad1LebaneseUniversity,Tripoli,Lebanon2LebaneseUniversity,Tripoli,Lebanon*AliH.Harmouch,E-mail:harmush_ah@hotmail.comAbstractAn
2、tennasarebecomingcrucialinanincreasinglygrowingnumberofapplicationsnamelywiththeemergingofthewirelessinternetcommunications,militarysystemslikeaircrafts,missilesandsubmarinesorevenoildrillingsystemswhereefficiency,compactnessandcostplayadecisiverole.Nonetheless,am
3、ajordrawbackofsuchsolutionsisthattheaforementionedcriteriaarehardtosimultaneouslyoptimize.Inthisproject,aninnovativeapproachrelyingonusingRing-ShapedSlottedWaveguideAntenna(RSSWA)asagoodalternativeispresented,thatallowsenhancingdrasticallytheratioofperformancevers
4、uscostandsize.SimulationresultsalongwithExperimentalvalidationswillbecarriedoutat2.4GHzfrequencyandindubitablydemonstratinghigheffectivenessintermsofdirectivityandhighgaingivenareducedcost,shapeandsize..IndexTerms–Slot,waveguide,omnidirectional,radiationefficiency
5、,compactness,pattern,directivity,highgain,RSSWA.1.IntroductionSlottedwaveguidearrayantennasareincreasinglyusedinnumerousareasofapplicationsmainlyinthefieldofmilitarycommunicationsasradarantennas,remotesensingantennasystems,aerospaceantennas,aswellasinwirelessinter
6、netdistributionsystemssincetheyhavevariousadvantagesoverothercompetitiveantennassuchashighpowerhandlingcapability,lowlossesandgoodcontroloverthesidelobes.Inaddition,slottedwaveguideantennasarelight,compact,easytofabricateandcapableofwithstandingradiation,thermalan
7、dvibrationrequirementsofaircraftapplications.Electromagneticnumericaltechniquesprovidethepossibilityofmodelingslottedwaveguideantennasaswellasoptimizingtheirelectricalcharacteristicsforfurtheradvancements.Theaimofthisworkistosimplyanalyzeanddesignahighgainantennaw
8、ithomnidirectionalcharacteristicsfortheuseasadistributingantennaforwirelessinternetcommunicationsystems.Forsuchapurpose,manyantennasystemshavebeenusedin
