Designation:D3380−14StandardTestMethodforRelativePermittivity(DielectricConstant)andDissipationFactorofPolymer-BasedMicrowaveCircuitSubstrates1ThisstandardisissuedunderthefixeddesignationD3380;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodpermitstherapidmeasurementofapparentrelativepermittivityandlosstangent(dissipationfactor)ofmetal-cladpolymer-basedcircuitsubstratesintheX-band(8to12.4GHz).1.2ThistestmethodissuitablefortestingPTFE(polytet-rafluorethylene)impregnatedglassclothorrandom-orientedfibermats,glassfiber-reinforcedpolystyrene,polyphenyleneoxide,irradiatedpolyethylene,andsimilarma-terialshavinganominalspecimenthicknessof1⁄16in.(1.6mm).Thematerialslistedintheprecedingsentencehavebeenusedincommercialapplicationsatnominalfrequencyof9.6GHz.NOTE1—SeeAppendixX1foradditionalinformationaboutrangeofpermittivity,thicknessotherthan1.6mm,andtestsatfrequenciesotherthan9.6GHz.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D150TestMethodsforACLossCharacteristicsandPermit-tivity(DielectricConstant)ofSolidElectricalInsulationD1711TerminologyRelatingtoElectricalInsulationD2520TestMethodsforComplexPermittivity(DielectricConstant)ofSolidElectricalInsulatingMaterialsatMi-crowaveFrequenciesandTemperaturesto1650°CD6054PracticeforConditioningElectricalInsulatingMate-rialsforTesting(Withdrawn2012)32.2IPCStandards:4IPC-TM-650TestMethod...
