电磁场与电磁波1new

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1、Field&WaveElectromagnetics电磁场与电磁波（双语教学）深圳大学信息工程学院通信工程系何业军副教授Email:heyejun@126.comIntroduction•TextBook:FieldandWaveElectromagnetics,(SecondEdition)byDavidK.Cheng•TeachingWebsite:http://cms.szu.edu.cn/emc•CourseAssessment:Attendance15%Homework(Projects,experime

2、nt)15%FinalExam(Open-bookExam)70%Contentstobecovered(Total36hours)•Chapter1Introductionandmathematicssupplements•Chapter2Staticelectricfields•Chapter3Solutionofelectrostaticproblems•Chapter4(*)Steadyelectriccurrents•Chapter5Basicstaticmagneticfields•Chapter6Ti

3、mevaryingfieldsandMaxwell’sequations•Chapter7Electromagneticplanewaves•Chapter8Theoryandapplicationsoftransmissionlines•Chapter9(*)Waveguidesandcavityresonators•Chapter10Introductiontoantennas1.1TheElectromagneticSpectrum1.1TheElectromagneticSpectrum1.2Applica

4、tionsofElectromagnetics(EM)1.2ApplicationsofElectromagnetics(EM)1.2ApplicationsofElectromagnetics(EM)1.2ApplicationsofElectromagnetics(EM)1.2ApplicationsofElectromagnetics(EM)1.2ApplicationsofElectromagnetics(EM)1.2ApplicationsofElectromagnetics(EM)Examples•Pr

5、opagationeffectscannotbeneglectedwhenthesignalpathisnotmuchsmallerthanthewavelength(e.g.~0.1wavelength)Highspeeddigitalcircuits–SystemClock~2GHz•Insidethecircuit,velocityofelectromagneticwave~2x108m/s(cisthevelocityinvacuum)–Ifsignalfrequencyf=1GHz,wavelengthλ

6、=2x108/1x109=0.2mExamples•Highfrequencyanalogcircuits–Frequency~1GHz–10GHz•Bluetooth•WLAN•OpticalCommunicationsExamplesRadiationbecomesefficientwhenthedimensionofconductorlargerthan0.1wavelength•ConsumerelectronicsElectromagneticCompatibility,orEMC,istheabilit

7、yofadevice,equipment,orsystemtofunctionsatisfactorilyinitselectromagneticenvironmentwithoutintroducingintolerableelectromagneticdisturbancestoanythinginthatenvironment.•ElectromagneticinterferenceandcompatibilityExamples•Otherapplications–Linearmotor–ComputerE

8、xample:Applicationoflinearmotor(MaglevTrain)TheShanghaiTransrapidMaglevLine:speedupto430km/hr.JapaneseBulletTrainWhatareFields?•GravitationalField•MagneticField•ElectricField1.3Vec