第46卷第3期2023年6月电子器件ChineseJournalofElectronDevicesVol.46No.3June2023收稿日期:2022-02-25修改日期:2022-04-28DesignofIonosphericAltimeterBasedonDomesticChipHUANGPeng,YANGGuobin∗,HUANGChunlei,LIHao(SchoolofElectronicInformation,WuhanUniversity,WuhanHubei430072,China)Abstract:Aportableionosphericaltimeterbasedonadomesticchipisdesigned.Thedesignideaofsoftwareradioisused,whichre⁃ducestheuseofexternalcircuitsasmuchaspossible.Forthetransmittingpart,thestructureofFPGA+high⁃speedDAC+powerampli⁃fierantennaisadopted,and2MHz-30MHzarbitrarywaveformmodulationsignalcanbegeneratedbyDDS.Fortheanalogpartofthereceiver,thetraditionalsuperheterodynestructureisabandoned.Afterthesignalisamplifiedbytheantenna+filter,itisdirectprocessedbythehigh⁃speedADCandtransmittedtotheFPGA,whichreducesthenoise,temperaturedriftandnonlineardistortionthatmaybecausedbytheanalogcircuit.Mostofthesignalprocessingiscarriedoutinthedigitaldomain,whichgreatlyimprovestheanti⁃interfer⁃enceabilityofthesystem.Forthedigitalpart,thedesignofdigitalmi...