微波铁氧体材料铁磁共振线宽和复介电常数测试技术-研究

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1、ABSTRACTABSTRACTThegyromagnetismofmicrowaveferritematerialscanbeutilizedtofabricatedirectionaldevicessuchasisolatorsandcirculators,andalsoleadtoavarietyofcontroldevicessuchasswitches,shiftersandtunablefilters.Thesemicrowavedevicesarewidelyusedinallaspectsofmili

2、taryandcivilian,suchasradar,electroniccountermeasures,highest-energyparticleaccelerator,mobilecommunicationandartificialsatellite.Theferromagneticresonancelinewidthandcomplexpermittivityofmicrowaveferritematerialsarepropertieswhichareoffundamentalimportanceinde

3、signthesemicrowavedevices.Therefore,itisveryimportantthatwestudythemeasurementtechnologiesofferromagneticresonancelinewidthandcomplexpermittivityofmicrowaveferritematerials.First,thepaperintroducesthedevelopmentofferritematerialsmeasurementbothathomeandabroad.A

4、ccordingtothespecificationrequirementsofthetestsystemandtheadvantagesanddisadvantagesofdifferenttestmethods,aTE106moderectangularcavitywaschoseninthestudyofferromagneticresonancelinewidthtesttechniques.Thecalculationformulasofferromagneticresonancelinewidthwere

5、givenundertheoreticalanalysisofperturbationtheory.ThensimulatingcalculationswithHFSSsoftwarewasusedtovalidatetheseformulas.Theprecisionofthehalf-powerpointcorrespondingappliedmagnetostaticfieldstrengthdeterminestheaccuracyferromagneticresonancelinewidth,sothisp

6、aperpresentedanovelmethodthatusethequalityfactoroftheresonantcavitybeforeandafterferromagneticresonancetocalculatethehalf-powerpoint.Thismethodhasgreatlyimprovestheaccuracyofthemeasurement.Thenthispaperanalyzedtheferritematerialcomplexpermittivitytesttheory,Acc

7、ordingtothespecificationrequirementsofthesystem,aTM010modecylindricalcavitywaschoseninthestudyofcomplexpermittivityofferritematerial.Formulasforcalculatingrelativedielectricconstantandlosstangentwerededucedandacylindricalcavitywasdesignedtocompletethecomplexper

8、mittivityofmicrowaveferritematerials.II万方数据ABSTRACTAccordingtothetestingprocessandtheory,anautomatictestsoftwarewascomplied,andwiththistestsystem,aseriesofmeasurementweremad