數(shù)字測控應(yīng)答機(jī)射頻系統(tǒng)設(shè)計與實(shí)現(xiàn).pdf

1、浙江大學(xué)信息科學(xué)與工程學(xué)院碩士學(xué)位論文數(shù)字測控應(yīng)答機(jī)射頻系統(tǒng)設(shè)計與實(shí)現(xiàn)姓名：鄭云卓申請學(xué)位級別：碩士專業(yè)：微電子學(xué)與固體電子學(xué)指導(dǎo)教師：金仲和20080514AbstractAbstractThemicrosatellitewhichisdesignedforMEMSexperimentationindeepspacehasgotrapiddevelopmentinrelevantfieldduringrecentyearsThemic

2、rosatelliteneedssmallvolumeandlightweight，andthereforebothelectronicsystemandmechanicalcomponentinitarerequiredtosatisfymicromationTheTracking，TelemetryandControlf丌&C)transponderonmicrosatellitemainlyprovidesuplinkcarrie

3、rtracking，controlinstructiondemodulation，rangingsignalturnaroundanddownlinkcarriergenerationandmodulationafterthesatellitegoesintoorbitSOitsimportanceisselfevidentTraditionalTr&Ctransponderisnotabletosatisfytherequiremen

4、tsofmicrosatelliteinweightvolumeandpowerconsumptionTheparticularityofcommunicationindeepspaceconditionrequireabetterdesignandperformanceinhardwarecircuitespeciallyfortheRFfrontendcircuitAdesignmethodologyofRFsystemrealiz

5、ationthatfittingforIF(intermediatefrequency)digitalTI&CtransponderisproposedinthisdissertationMostoftheRFfront—endiscomposedofintegratedchipswithindustrystandardorabove；thusitsstructureissimplifiedTheRFreceiverdownconver

6、tsRFuplinksignaltointermediatefrequencydirectlybymixingitwithLO(10caloscillator)frequencysignalonlyonce，whilethetransmitterupconvertsthebasebandsignalbysecondarymixingLOfrequencysignalalegeneratedbyafullyintegratedintege

7、rNfrequencysynthesizerwhichneedsanexternalloopfiltercircuitsSignalpowercalculationbothinuplinkanddownlinkshouldbedonecarefullyonthebaseofsatellitecommunicationstheoryThistypeofTr&Ctransponderisaflexibledesignthatbycarefu

8、lselectionofthelocaloscillatorfrequencyallRFmoduleswilloperateatthesameintermediatefrequencyfordifferentuplinkfrequencyasisconvenientforthefolloweddigitalprocessingAnSbanddigitalTT&Ctransponderforthemicrosatellitehasbeen