标签: cross-couplings

Synthesisofadvancedmicrowavefilterswithoutdiagonalcross-couplings2862IEEETRANSACTIONSONMICROWAVETHEORYANDTECHNIQUES,VOL.50,NO.12,DECEMBER2002SynthesisofAdvancedMicrowaveFiltersWithoutDiagonalCross-CouplingsRichardJ.Cameron,Fellow,IEEE,A.R.Harish,Member,IEEE,andChristopherJ.Radcliffe,Member,IEEEAbstract―Asymmetricfilteringcharacteristicsarefrequentlyusedforthedesignofmicrowavefiltersforthecellulartelephonyindustry,particularlyforthetransmit/receivediplexersforbasestations.Typically,suchfiltershavetobemanufacturedinlargequantitiesatthelowestpossiblecost.However,duetotheasymmetricfilteringcharacteristics,thedesignsoftenincludediagonalcross-couplingsbetweennonadjacentresonatorsinadditiontotheusual“straight”couplings.Diagonalcouplingstendtobemechanical……

WaveguideFilters_Cross-CouplingsDesignProcedureforWaveguideFilterswithCross-CouplingsJanKocbachandKjetilFolgerNeraASA,NeraResearch,N-5020Bergen,NORWAY.Email:jko@nera.no,kfo@nera.noAbstract―Anewrigoroussystematicdesignprocedureforfoldedwaveguidefilterswithcrosscouplingsispresented.Theprocedureisacombinationofacircuitmodelanalysisandafull-wavemethod,andisbasedontuningonedimensionatatimeforsimplewaveguidestructurestowardssimpletuninggoals.Throughexamplesitisshownhowtheprocedurecaneliminatetheneedforglobaloptimization.Asaconsequenceofthisprocess,thetimeneededforrealizationoffiltersofthistypeisgreatlyreduced.Examplesoffiltersdesignedusingthedescribeddesignprocessaregiven,includingcomparisonwithmeasurements.I……