Esittely
Themillimeterwaveradarworksinthemillimeter waveband.Yleensä millimeterwavereferstohe30-300 gHzFreequencyband (aallonpituus1-10mm).AallonpituusMillimeterwaveisbetweencentimeterwaveandlightwave, somillimeterwavehastheadvantagesofMicRawaveGuidanceandphotoelectricguidance.Verrattuna.Verrattuna.Adddition, theanti-interferenceandanti-stealthCapability ofthemillimeterwavegueseekerarealsosuperiortoothermicRawaveseekers.
Edut
TheeattenuationOflightwaveProPagationIntheatMosphereisserious- ja theprocessingPrecisionOftheDeviceisRequiredTobehigh.Verrattuja valaistusWaves, millimetriwavesuseatmosfäärinWindows (WHERMILMETERWAVESANDSUBMILLIMETERWAVESPROPAGATEINTHEATMOSPERE, JOTKA TOTEUTTAVATTONIONTIONIONESOTERESONANCEABSORPTOFGASMOLECULESEMININIMINIVALUE).AndtheheatradiationsourceHasLittleinfluence.Forthisreason, heikojengificancIncommunications, tutka, ohjaus, etäisyystietotekniikka, radioastronomia, ja spektroskopia.KäyttämälläThemillimeter WaveFrequencyOftHeatMosfäärinWindowCanrealizelarge-kapiteetinsatelliitti-GroundCommunicationorgroundRelayCommunications.SittenrowbeamandlowsidelobePerformancefthemillimeterwaveantennacanbeulevetorealizelow-elevationprecisiontrackingradarandimagingradar.Whenalong-rangemissileorspacecraftreturnstotheatmosphere, iTisneryeyTouseMillimeterwavesthatcansmoothlyPenetheTheplasmatoachievecommunication jaguidance.The ResolutionMillimeterWaveradiometerIscableForremotESensingofMeteorologicalParameters.Käyttämällä millimetri-waveteandsub-millimetri-waveradiotelescopestodetectTheradiaationspektrumofspacaninfertheCompositionsOfterstellarTatterspektrumos.ThrainEdutareasfollows:
(1) SmallAntennaapecture, kapeavirta: HighTrackingandguidanceaccuracy; eleytoTrackaTloweleVationGles, vastustusmaaMultiPathandclutterference; HighlateralResolution; HighAngularResolutionForRegionalIMegingAndTargetMonitoring; Helppo-JammingPerformanceWithSeRowbealine;.
(2)Largebandwidth:withhighinformationrate,itiseasytousenarrowpulseorbroadbandFMsignaltoobtainthedetailedstructurecharacteristicsofthetarget;withwidespectrumspreadingability,reducemultipath,clutterandenhanceanti-interferenceAbility;Adjacentfrequencyradarormillimeterwaverecognizerwork,easytoovercomemutualinterference;highrangeresolution,easytoobtainaccuratetargettrackingandrecognitioncapabilities.
(3) HighDopplerFrequency: GoodDetectionAndRecognitionCapabilitySForslowTargeTSandVibrationTargets; EasyTousetargetDopplerFrequencyCharacteristicsOctArgetFeatureidentifications; LetteroontCharacteristicsfordryAirPolletionsion, tarjoaGoodDeTectionAndUndUndusta, SmokkianddrySnowConditions.
(4) Gootanti-varusteet: The ForurrentabsorbingMaterialScoatdonStealtAirCraTAreaMeDatEntimetRials.AIKAISEKSI, TEESTHEALTIORGETILLUMINEDBYTHEMILLETERWAVERADARCANFORMSTRONGELECTROMATICSCATTERINGINMANYPARTS.Siksi themillimeterwaveradaralsohasthepotentialofanti-scealth.
Haitat
Themainlimitationsoftheapplicationofmillimeterwavesinradarare:theattenuationofhighhumidityenvironmentssuchasrain,fog,andwetsnow,aswellasthereducedimpactofhigh-powerdevicesandinsertionlossThedetectiondistanceofmillimeterwaveradar;thepenetrationabilityoftreesispoor,comparedwithmicrowave,thepenetrationofdensetreesislower;thecostofcomponentsishigh,theprocessingaccuracyisrelativelyhigh,andthedevelopmentofmonolithictransceiverintegratedcircuitsisrelativelyslow.
Kehitysprofiili
MmillimeterWaverAdarStartedinthe1940 -luvun kehitys.1950-luvulla millimetri-waveradars (työaaltoaalto.Kuitenkin duetotechnical difficculties, theDevelmentOfMillimetRWaverAdarWasonCerEnted.Theseteknical diffculcultiesaremainly: ASTheOperatingFrequencycensions, OutputPowerandEffecentiveShepowerSourceDecrease ja theThereVermixeriAndtransMissionLossesEncrease.Sincethemid-1970S, millimeterwavetechnologyHasmadegreatprogress, jaSomebetterPowerSourCeshaveBeEnSuccessly kehittyneet: kiinteä varustetut EVICESSUCHASAVALANCHEUBEUD (Seeavalanchedes) jaGunscientucrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrondrybes (seeAeAnand:.Pulseworkingingsolid-StatePowersourcesimellyUSEAVALANCHEUBEUDES- ja heidän.TemagnetronCanbeUsedasahigh-Powerpulse PowerSource, ThePeakPowerCanReach1to6 kilowatts (95 GHz) OR1 kilowatti (140 GHz) ja EfficienceisaBout10%.ThegrotronisanewTypeofmicrowaveandmillimeterwaveoscillatorororamplifiertCancanprovidemegawatt-tasonpeakpowerinthemillimeterwaveband.Intermsoflow-noisemixers, schottkydiodes (Seecrystaldiodes, Schottkyjunctions) sekoittimet.IntherangeOf100GHz, poneeTemperatureoflow-noisemixersCanbeaslowas500k (jättämätön) OR100K (jäähdytetty).Lisäksi tekniikat, jotka ovat korkea-asteen tuotto-, integroidut piirit ja fin-linja-awaveguideshavealSodeveloidut.Sincethelate1970S, millimetri-waveradarhasbeenunedInmanyImportanCivilandMilitarijärjestelmä, sellainen.
Sovellettavat vaatimukset
MyöhennysmyymälätMillimeterWaveradar, ItCaneaSilyMeetthefowingingSoveltaminenRequirements:
(1) korkean tarkkuusmulti-ulottuvuussearvon mittaus: korkeanhallinnan mittaus jaopinnoinnin, atsimuutin, taajuuden jaSpatialPosition;
(2) TheradarInSTALLATIONPLATFORMHASSTRICTREEFRESSIONFORVOLUME, paino, värähtelyn jaTerenVirons: thrillIlleterwaveradarantennaissmallinsizize, kevytpainot ja eASyTomeetSpecialNivironmentalrequirentsFordIfferentPlatFormssuChasportable, ohjuslausu, ajoneuvojen kanssa, lentoliikenteessä, lentoliikenteessä;
(3) TargetFeatureExtractionAndClassificationRecognition: Millimetri-WaveradarHighResolution, WideworkingFrequencyBand, LargeValedOpplerFrequencyResponse, lyhytaikainen aallonpituus, helppokäyttö., sopii,
(4) SmallTargetAndCloserangeDeTection: OopticalzonecorrespestToTheshortwavelengthThemillimetRWaveissmall, anditismorestutedForsMallTargetDetectionThanthemicrowaveradar.Lukuun ottamatta Forforlong-rangemillimetri-waveradarsssuchasspecialSpaceTargeTobServications, GeneralMillimeter-WaveradarSaresActEForshort-RangedeTectionBelow30km;
(5) StrongresistanceTeelektronicWarfareInterference: WideBandSavAbleFormIllimeter-aaltowindows, EasyToCarryoutbroadBandsPreadSpectruMandFrequencyHopingDesign.ATTHESAMETIME, TÄTÄ.Millimetri-waveradarshavebetteranti-interferencecapabilitiesthanmicrowaveradars.
Soveltaminen
①MissileGuidance: YhdenOfTHEMAINUSSOFMILLETERWAVERARISTHETERMINALGUIDANCEFACTICALMISSILES.Themillimeterwavegueseekerhasthecharacteristics ofMallSize, alahenkilöstö-.WhentheoperatingfrequencySelectedat35ghzor94ghz, theantennaapectureisgeneraly10-20cm.Adddition, millimetri-waveradarsarealSousedinbeamGuidancesystemstoControlshort-Rangemissiles.②TargetSurveillanCeanDInterception: MillimeterWaverAdarissiittableForshort-Range, korkearesoluutioinen.③GunFirecontrolandtracking: MillimeterwaveradarcanbeUnedforgunFirecontrolandTrackingOflow-altitudetargets.ItHasbeEnDeveledIntoa94GHZMONOPULSTRACKINGRADAR.④Radarmeasurement: Korkean resoluution ja korkean tarkkuusmillimetri-waveradarcanbeUnedTomeasuretTargeTandclutterCharacteristics.TämäkinkindofradargenerallyMultipleoperatingFreensices, multiplerEceivindtransMittingpolarisaatiomuodot ja varusteet.Theradarcross-sectionalareaofthetargetismeasuredusingthefrequencyratiomethod.Usingmillimeter-waveradartomeasurethescaled-downtargetmodel,thecross-sectionalareaoftheradartargetatalowerfrequencycanbeobtained.Lisäksi millimetri-waveradarsarealSousedterraintracking, Missilefuzes ja meri.