gaas+fet微波控制电路管芯建模的研究与应用

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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