基于優(yōu)化理論的寬帶有耗匹配研究.pdf

1、大連海事大學(xué)碩士學(xué)位論文基于優(yōu)化理論的寬帶有耗匹配研究姓名：陳文軍申請學(xué)位級別：碩士專業(yè)：電子科學(xué)與技術(shù)指導(dǎo)教師：朱義勝20090601AbstractLossyBroadbandMatchingResearchBasedonOptimizationTheoryAbstractWiththedevelopmentofcommunicationtechnologytheapplicationofadhoeandspreadspectrum

2、techniqueincommunicationsystem，modernmobilecommunicationtechnologycallforhigherrequirementonthebroadbandofantennaThelosslessbroadbandmatchingisaneffectivetechnologyinthedesignofantennamatchingcircuitsHoweverthevarianceof

3、antenna’SimpedancecausedbyexternalenvironmentmakestheperformanceofmatchingcircuitweakenThethesismainlydiscusseshowtoemploythelossyelementtokeepthematchingcircuitfromaffectingbytheimpedancechangeofantennaInthepartoftheory

4、principleoflosslessbroadbandmatchingandrealizationofalgorithmsofmulti—objectiveoptimizationareintroducedGeneticalgorithmandNSGA—IIarediscussedondetail，whicharebasementoflossymatchingwhichwillbestudiedinthebackInpartofimp

5、lementing，first，theimpactonthematchingperformancecausedbythechangeofantenna’SimpedanceisgivenintheformofthechangeoftransformpowergainandvoltagestandingwaveratioAcasestudyismadetoshowthereasonthatlossyelementsisusedinmatc

6、hingThen，aftertheobjectivesoflossymatchingbeinggivenintheformoftheSparameteroftwoportnetwork，theproblemcausedbyusinglossyelementisbroughtforwardFinallyelementvalueoptimizationforprescribedcircuitbyusinggeneticalgorithmva

7、lidatesthefunctionoflossyelementThetradeoffbetweentransformpowergainandvoltagestandingwaveratioonthepremiseofgivingresisterandPiattenuatorusingtheNSGAII，willprovidemorechoicefordesignersTheapplicationoflossymatchingtechn