天线阵列馈电网络中的功分器分析

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1、AbstractiiiAbstractWiththerapidprogressinspacetechnology,phasedarrayantennasdevelopfastwiththerequirementofradartodiscoverandtrackthetargetsatagreaterdistanceandwiderarea.Themicrowavepowerdividers,asoneofthemostimportantcomponentsinthefeednetwork,arewidelyanddeepl

2、yresearched.Inthisthesis,powerdividersareproposedrespectively,allofwhichcansatisfythedemandsofmulti-port,Kbandandwidebandofantennaarray.Firstly,thebasiccharacteristicandoperationprincipaloftheWilkinsonpowerdividerareintroduced.Six-waydividerswhichsatisfytherequire

3、mentsofequalpowerlevelandequalphaseofunitsofarrayantennasarefabricatedbyintroducingequivalentcircuittransformation.Secondly,thecharacteristicoffrequencyresponseofthedividerworkswellintheKbandbyimprovingthestructureoftheconventionalWilkinsonpowerdivider.Themeasured

4、resultsprovedtheutilityandpracticabilityoftheproposeddesignmethods.Finally,widebanddividerisgeneratedbyintroducingaimpedancetransformeremployingatransmissionlineandacoupled-linesectioninsteadofaconventionalquarter-wavelengthlongimpedancetransformer.Theproblemofthe

5、spanbetweencouplinglineistoonarrowtoprocessinghasbeensolvedbyintroducingDGS.Thegoodagreementsbetweenmeasuredandsimulatedresultsprovethepracticabilityoftheproposedmethods.KeyWords:powerdividerWilkinsonpowerdividermulti–waypowerdividertransmissionlineandcouplingline

6、DefectedGroundStructure目录v目录第一章绪论..............................................................................................................11.1选题背景及其意义......................................................................................11.2本文所开展的工作...........

7、...........................................................................3第二章功率分配器的基本原理..............................................................................52.1功分器的工作原理.....................................................................................

8、.52.2Wilkinson功分器.........................................................................................82.3奇偶模分析方法...................................