此GPS天线介质陶瓷系列:尺寸有25*25 20*20 18*18 15*15 13*13 12*12常用.60*60 30*30多种尺寸规格可供客户选择要.适用于卫星定位.导航系统.也可以客户指标订做1.ELECTRICALSPECIFICATIONSNO.PartNumberOutlineDimensionGroundPlane1-1DA1575S25T2A25*25*2mm 35*35mm1-2CenterFrequency1575 3MHz1-3Bandwidth15MHzmin.1-4Impedance50 1-5Gain@Zenith+3.5dBitypical1-6FrequencyTemperatureCoefficient0 10ppm/℃1-7ReturnLoss@fo20dBmin. 2.STRUCTUREANDMATERIALNo.DescriptionStructureandmaterial2-1AntennaSubstrateDielectricCeramics2-2PinCopper,leadandtinplate2-3ElectrodeAgplated2-4GroundBaseAgplated 3.PHYSICALDIMENSIONS 4.ENVIRONMENTALSPECIFICATIONSStandardCondition:Temperaturerange:25 3℃ RelativeHumidityrange:55~75%RH OperatingTemperaturerange:-40℃~+85℃ StorageTemperaturerange:-40℃~+100℃4.1HighTemperatureEnduranceThedeviceshouldsatisfythespecificationinTable1afterexposedtotemperature85 5℃for24 2hoursand1~2hoursrecoverytimeundernormaltemperature.4.2LowTemperatureEnduranceThedeviceshouldalsosatisfythespecificationinTable1afterexposedtothetemperature-40℃ 5℃for24 2hoursand1~2hoursrecoverytimeundernormaltemperature.4.3MoistureProofThedeviceshouldsatisfythespecificationinTable1afterexposedtothetemperature40 2℃andtherelativehumidity90~95%RHfor96hoursand1~2hoursrecoverytimeundernormalcondition.4.4VibrationResistThedeviceshouldsatisfythespecificationinTable1afterappliedtothevibrationof10to55Hzwithamplitudeof1.5mmfor2hourseachinX,YandZdirections.4.5DropShockThedeviceshouldsatisfythespecificationinTable1afterdroppingontothehardwoodenboardfromtheheightof30cmfor3timeseachfacetofthe3dimensionsofthedevice.4.6TemperatureCycleTestThedeviceshouldalsosatisfythespecificationinTable1afterexposedtothelowtemperature-25℃andhightemperature+85℃for30 2mineachby5cyclesand1to2hoursrecoverytimeundernormaltemperature.