标签: balun

AWidebandBalun—HowDoesitWorkAWidebandBalun―HowDoesitWork?AntennasoftenrequireabalancedfeedsystemlikethecircuitdescribedinthisarticleByJ.Thaysen,K.B.JakobsenandJ.Appel-HansenTechnicalUniversityofDenmarkheneverabalancedantenna(i.e.,dipole,looporspiral)isused,theissueofhowtofeedtheantennabecomesrelevant.Becauseabalancedantennarequiresabalancedfeed,abalunisneeded.Abalancedantennafedbyatwo-wiretransmissionlineisabalancedsystemwithrespecttoLFigure1.Balunforusewithaspiralantenna.thelines,providedthatthetwofeedpointsonthebalancedantennahavethesameorientationandplace-makesitrealizableusingconventionalphotomentwithrespecttothelines.Ifthebalancedtechniques.(symmetrical)antennaisconnectedtoacoaxi……

RFBalunTransformersApplicationNoteRFBalunTransformersM565V2.00IntroductionThisapplicationnoteisdesignedtohelpthereaderunderstandhowbaluntransformerscanbeusedintoday’sRF/Microwavecommunicationapplications.Thereisanincreasingdemandforbaluntransformersintoday’stelecommunicationmarketandM/A-COMisleadingtheeldwiththisdevice.Asmanyassixofthisdevicecanbeusedaroundanyparticularchipasillustratedingure4.M/A-COM’sbaluntransformercanbeclassiedintotwogroupsA)TheuxcoupledbaluntransformerandB)Thetransmissionlinebaluntransformer.Figure3.1:1TransmissionLineBalunTransformerDenitionofTermsInsertionLoss(dB):Lossduetotransmissionfromprimarydotporttosecondarydotportandsecondaryport.Mostbaluntransformersare……