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1、lbCC1KANSACIlVNSONANTENNASANDPROPAGATION.VOL.AP-29,NO.1,JANUARY1981151ElectromagneticallyCoupledMicrostripDipolesFFfFouEhTY=680hwUSING16cmx26cmCAVITIESH.GEORGEOLThlAN,SENIORMEMBER,IEEE,AND3/16.nDONALDA.HUEBNER,MEMBER,IEEEM!/8I”1/16mAbstract-Anewclassofprintedcircuitradiatorconsistingo
2、fa003310003200003OCDW00005microstripdipoleelectromagneticallycoupledtoamicrostripfeedlineSKINDEPTH,A,Cmisdescribed.Severalconfigurationswhichdifferinbandwidth,Fig.1.LosstangentversusskindepthforRexolite2200fordielectricefficiency,andconstructionsimplicityarepresented.Ageometrythicknes
3、sesof1/16,l/8,and3/16in.whichhasbeenfoundtobeoptimumformanyapplicationsisnoted.Radiationcharacteristicsofbothisolatedelementsandarraysofelementsareexamined.Experimentalandtheoreticalresultsarethe“sandwich”affectedthemeasuredQ.Ourresultsseemedpresented.toindicatethatclampingpressurehad
4、nosignificanteffectontheresults.Thusthelinesrepresentedby(3)becometheI.INTRODUCTION“bands”showninFig.1.Inthiscasethreecavitieswerecon-structedofnominalthicknesses1/16,1/8,and3/16in.TheDuringthepastdecade,anumberofdifferenttypesofsolidblackregioninthefigurerepresentstheoverlapofallmicr
5、ostripradiatorshavebeendescribed[11-[5].Themajor-threebandsandmostprobablycontainsthetrue.poinr(60,ityoftheseemployresonantelementsanddifferprimarilyinAo).ThecentroidofthisregionisareasonablepointtotaketheirparticularshapesandthemannerinwhichthemicrostripforAo).Ifthisisdone,oneconclud
6、esthatthelosstan-feedlinesareattached.Theysharethecommonprincipleofgentofthissampleofmaterialis1.1X10-andtheconductiv-beingresonanttransformerswhichmatchtheimpedanceofityofthecladdingis364Kmholcm.Thisconductivityisaboutthemicrostripfeedlinetotheimpedanceoffreespace.Each5/8thevalueofpu
7、recopper.Thusitisapparentthatthesur-insomemannerprovidesameansforweaklybutcriticallyfacefinishcanhaveasignificanteffectontheconductivity.couplingthefeedlinetotheresonator-afeatureincommonInclusionoftheestimatedlossinthesidewallsofthecavitywithmanyotherresonantphenomena,suchasiris-coup
8、ledis
