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ID:32354134
大小:2.63 MB
页数:72页
时间:2019-02-03
《gaas+fet微波控制电路管芯建模的研究与应用》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、GaAsFET微波控制电路管芯建模的研究与应用AbstractMicrowavecontrolcircuitshavebeenwidelyusedinmodemelectronicsystems,suchasphased-arrayradar,electroniccountermeasureandsmartantennasystem,etc.MicrowaveMonolithicIntegratedCircuit(MMIC)technologyisthekeymethodtorealizethecontrolcir
2、cuits,whereFETplaysthefundamentalroleinthecircuitdesign.啦sthesisresearchesonthemodelingofFETwhichwillbeusedinthedesignofmicrowavecontrolcircuits.ThemodelforFETwithfixedgatewidthisdemonstratedandimproved.Theoriginalmodelfromthedesignkitfitsthecontrolcircuitdesi
3、gnbelow6GHz,whiletheimprovedmodelissuitablefortheultra-widebandmicrowavecontrolcircuitdesign.ne丘equencyrangefortheimprovedmodelisO.1GHz~26.1GHz.BaseonthecomparisonofthetransmissionandreflectioncharacteristicsfromtheimprovedmodelandthemeasuredSparameter,wefindt
4、hattheimprovedmodelholdsahi.ghaccuracyforthecontrolcircuitdesign.1rI圮highlightofthisthesislaysontheresearchofthegeneralmicrowavecontrolcircuitmodel,whereacompletescalingrelationshiphasbeengiven.Alltheresistors,capacitorsandinductorsinthegeneralmodelhavetheirow
5、nscalingrelationship.Bothofthesinglegatewidthandthenumberofgatefingersareincorporatedinthescalingrelationship.Andbesidesthevalidationoftheaccuracyforthegeneralcontrolcircuitmodel,thescalingrelationshipisalsopreliminarilyvalidated.Inanotherway,thesinglegatewidt
6、hforthegeneralmodeldocsn’tneedtobefixed.So,theflexibilityfortheMMICdesignersisreallyhighiftheytrytousethegeneralmodelinthethesis.Anyway,thegeneralFETcontrolcircuitmodeldiscussedinthethesisprovidesagoodoptionfortheMMICcontrolcircuitdesign.Finally,thedesignandme
7、asuredresultsforasix-bit2·18GHzdigitalmicrowaveattenuatorandafive-bit6—18GI-Izdigitalphaseshifteraregiven.So,thevalidityandreliabilityforthemodelareverified.Itshowsthatthedemonstratedresearchmethodandresultcouldsatisfytherequirementsformicrowavecontrolcircuitd
8、esign.AndtheresearchedmicrowavecontrolcircuitmodelforFETcouldbegenerallyreferencedforothertransistormodelingresearches.Keywords:Transistormodeling,microwavecontrolcircuit,MMICⅡ目录硕士
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