标签: shifter

PhaseShifterDesignTutorialSheet1of12PhaseShifterDesignTutorialIntroductionPhaseshiftersaredevicesusedtoadjusttransmissionphaseinasystem,theycanbefixedphasedigitalphaseshiftersoranaloguevariabletypes.Switched-LinePhaseshifterThesephaseshiftersaresimilartotheirattenuatorequivalentwheretwoSPDTswitchesareusedtoswitchtwolinelengths,oneofwhichisXdegreeslongerinelectricallengththantheother.ThecircuitisshowninFigure1.VcontrolLinelength2Linelength1Figure1Switched-linephaseshifter.Linelength2hasalongerelectricallengththanlinelength1sowhenswitchedinlinewillcauseanin-linephaseshiftφ=β(l2-l1).Requiredphaseshiftφ=β(l2l1)Whereβ=ωVpandVp=1εeffExampleDesignaswitched-linephaseshifterwit……

MicrostripPhaseShifterAMICRO-SPRINGSUPPORTEDMEMBRANEFORRECONFIGURABLEDEFECTEDGROUNDMICROSTRIPPHASESHIFTERByTinaShoaAdvisor:Dr.C.ShafaiOutlineElectronicBeamSteeringPhaseShiftersMEMSPhaseShiftersSwitchedlinetypeDMTLtypePBGbasedReconfigurablegroundplaneEffectofslotsizeonphaseshiftEffectofmembranedeflectiononphaseshiftFabricatedstructureExperimentalresultSummaryReconfigurableDefectedgroundPhaseShifterElectronicBeamSteeringApplicationReconfigurablewirelessandsatellitecommunication.radars.Advantagesovermechanicallyscannedantenna.Fastscanning.Eliminatingmechanicalcomplexity.Morereliable.Fig.1ElectronicbeamsteeringVaryingthePhasebetweenadjacentelements.Usingphaseshiftersandoperatingatafixedfreque……