标签: radiated

Short-rangeradiosthatoperateattheIndustrial,Scientific,andMedical(ISM)frequenciesfrom260MHzto470MHzarewidelyusedforremotekeylessentry(RKE),homesecurity,andremotecontrol.Acriticalperformancemeasurementfortheradiotransmitteristhepowerthatitradiatesfromtheantenna.Thispowermustbehighenoughtomakethelinkbetweenthetransmitterandreceiverreliable,yetitmustnotbesohighthatitexceedstheradiationlimitsestablishedinPart15.231oftheFCCRegulations.ThisapplicationnotediscussestherelationshipbetweenFCCfield-strengthrequirementsinthe260MHzto470MHzfrequencyrangeandtheradiatedpowerandtypicalquantitiesmeasuredonatestreceiver.Tableswillillustratethevaluesthatadesignercanexpecttoobtaininfieldtests.……

摘要：介绍了影响噪声性能的移动电话手机问题。电源供应布局改善显示以减少噪音的问题。减少噪音低频率下的受雇线性稳压器。功率放大器偏压调节到射频输出上的噪音。低压差稳压器输出噪声被解释。Maxim>AppNotes>BATTERYMANAGEMENTPOWER-SUPPLYCIRCUITSKeywords:cellulartelephones,noise,powersupply,conducted,radiated,layout,GSM,TDMAJan24,2001APPLICATIONNOTE668ManagingNoiseinCell-PhoneHandsetsAbstract:Presentscellulartelephonehandsetissuesimpactingnoiseperformance.Powersupplylayoutimprovementsareshowntoreducenoiseproblems.Linearregulatorsareemployedtoreducenoiseatlowfrequencies.PoweramplifierbiasmodulatesnoiseontotheRFoutput.Lowdropoutregulatoroutputnoiseisexplained.Tobesthandletheproblemofcell-phonenoise,youshouldapplyanunderstandingofthephone'snoise-couplingmechanisms,noise-sensitivecircuitnodes,andnoise-generatingcircuits.Figure1.Switch-modeandlinearregu……

摘要：设计一个最佳的电磁兼容性（EMC）米，可以是任何工程师的挑战。EMC和电磁干扰（EMI）测试单和三相电能计量IC涉及到传导和辐射，射频抗扰度，静电放电（ESD），电快速瞬变脉冲群（EFT）测试。本应用笔记介绍Teridian的71M6511/71M6513/71M6515H能源米演示板的EMI/EMC规定的细节。具体来说，文章提出抑制电磁干扰的方法，不影响水表的准确性。71M65XXEnergyMeterICAMaximIntegratedProductsBrandAPPLICATIONNOTEAN_65XX_016JUNE2011EMC/EMIDesignGuidelinesfor71M65XXICsDesigningameterforoptimumelectromagneticcompatibilitycanbeachallengingissueforanydesignengineer.EMC/EMItestingformeteringproductsinvolvethefollowing:ConducedandRadiatedEmissionsRFImmunityElectrostaticDischarge(ESD)ElectricalFasttransient(EFT)Success……

摘要：电磁兼容性（EMC）必须优先从电能表的设计周期的开始。有很多常规EMC/电磁干扰(EMI)测试计量设备，其中包括进行和辐射排放、RF免疫、静电放电(ESD)和电气快速暂态（EFT）的测试。这些测试的结果取决于若干因素，包括PCB设计和固件代码。本应用指南介绍了而不影响的Teridian准确性提高EMC的方法71米6521，住宅电能表SoC.以下这篇文章的建议有助于产生emc/电磁兼容设计最前面。71M652XPowerMeterICAMaximIntegratedProductsBrandAPPLICATIONNOTEAN_652X_041March2009DesignforEMC1INTRODUCTIONDesignforelectromagneticcompatibility(EMC)mustbeatoppriorityfromtheverybeginningofthemeterdesigncycle.RoutineEMC/EMItestsformeteringproductstypicallyinclude:ConductedandRadiatedEmissionstestsRFImmunitytestswithandwithoutloadElectrostaticDischarge(ESD)testsElectricalFast……

Part4–RadiatedimmunityEMCtestingPart4……

Part1–RadiatedemissionsEMCtestingPart1……

ControllingRadiatedEMIThroughPCBStackControllingRadiatedEMIThroughPCBStack-up(09/08/00,12:33p.m.ET)ByRickHartley,L-3Communications,AvionicSystemsThere'smorethanonewaytoskinacatandevenmorewaystobattleEMI,beginningatoneofthemostbasiclevelsofPCBdesign.ClearlythereareanumberofcircuitandPCBdesigntechniquesthatdesignersandengineersneedtomasterinordertocontrolhigh-frequency,radiatedEMI.It'sfairlywellunderstoodthatcircuitboardstack-upcanplayamajorroleintheefforttocontrolEMI.Agoodstack-uphelpstocontainelectricandmagneticfieldsandisaverystrongaidintheefforttobypass/decouplethepowerbus.Thisarticlewillexaminetheseissuesanddetailseveralboardstack-upsdesignedtoaccomplishthesegoals.ThepowerbusWhenanIC……

RadiatedSusceptibilityRadiatedSusceptibilitybyRonBrewer,EMC/ESDConsultantSomeEMCtestsareaboutasexcitingaswatchinggrassgrow.However,Imustadmitthattoday’scomputercontrolbeatsthepreviousproceduresthatincludedhighlymanualtestingfollowedbylengthyandoftenverytediousrechecking,recording,andanalyzingresults.Throughouttheyears,theelectricfield(EF)radiatedsusceptibility/immunitytestremainsthemostfunEMCtesttorun.It’ssoeasytoproducetherequiredEFatanydesiredfrequencythatwecanreallyconcentrateontestingtheEUT.PerformingtheRSTestRadiatedsusceptibility(RS)testinginitsvariousformsismandatedbyanumberofEMCspecificationsincludingMIL-STD-461,MIL-STD-464,andtheEU.Thoseofyouwhohavereadthearticletitled"EMCFailure……