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内容简介
本书简明易懂，贴近读者，深受广大师生欢迎。 本书包含许多实例、问题、章末小结和适当的背景材料。书中首先介绍静电磁场和静磁场的基本概念，继而讲解麦克斯韦尔方程、电磁传播、电磁传输和电磁辐射。另外，还增加了关于有限元法和有限差分法的章节以及关于史密斯圆图的详细附录。可以通过访问www．cambridge．org／0521830168得到本书许多实例的MathCAD源码以及综合解决方案。
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顾客评论
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目录
目 录 Preface Acknowledments 1 Electromagnetic field theory 1.1 Introduction 1.2 Field concept 1.3 Vector analysis 1.4 Differential and integral formulations 1.5 Static fields 1.6 Time-varying fields 1.7 Applications of time-varying fields 1.8 Numerical solutions 1.9 Further study 2 Vector analysis 2.1 Introduction 2.2 Scalar and vector quantities 2.3 Vector operations 2.4 The coordinate systems 2.5 Scalar and vector fields 2.6 Differential elements of length, surface, and volume 2.7 Line, surface, and volume integrals 2.8 The gradient of a scalar function 2.9 Divergence of a vector field 2.10 The curl of a vector field 2.11 The Laplacian operator 2.12 Some theorems and field classifications 2.13 Vector identities 2.14 Summary 2.15 Review questions 2.16 Exercises 2.17 Problems 3 Electrostatics 3.1 Introduction 3.2 Coulomb’s law 3.3 Electric field intensity 3.4 Electric flux and electric flux density 3.5 The electric potential 3.6 Electric dipole 3.7 Materials in an electric field 3.8 Energy stored in an electric field 3.9 Boundary conditions 3.10 Capacitors and capacitance 3.11 Poisson’s and Laplace’s equations 3.12 Method of images 3.13 Summary 3.14 Review questions 3.15 Exercises 3.16 Problems 4 Steady electric currents 4.1 Introduction 4.2 Nature of current and current density 4.3 Resistance of a conductor 4.4 The equation of continuity 4.5 Relaxation time 4.6 Joule’s law 4.7 Steady current in a diode 4.8 Boundary conditions for current density 4.9 Analogy between D and J 4.10 The electromotive force 4.11 Summary 4.12 Review questions 4.13 Exercises 4.14 Problems 5 Magnetostatics 5.1 Introduction 5.2 The Biot–Savart law 5.3 Ampere’s force law 5.4 Magnetic torque 5.5 Magnetic flux and Gauss’s law for magnetic fields 5.6 Magnetic vector potential 5.7 Magnetic field intensity and Amp`ere’s circuital law 5.8 Magnetic materials 5.9 Magnetic scalar potential 5.10 Boundary conditions for magnetic fields 5.11 Energy in a magnetic field 5.12 Magnetic circuits 5.13 Summary 5.14 Review questions 5.15 Exercises 5.16 Problems 6 Applications of static fields 6.1 Introduction 6.2 Deflection of a charged particle 6.3 Cathode-ray oscilloscope 6.4 Ink-jet printer 6.5 Sorting of minerals 6.6 Electrostatic generator 6.7 Electrostatic voltmeter 6.8 Magnetic separator 6.9 Magnetic deflection 6.10 Cyclotron 6.11 The velocity selector and the mass spectrometer 6.12 The Hall effect 6.13 Magnetohydrodynamic generator 6.14 An electromagnetic pump 6.15 A direct-current motor 6.16 Summary 6.17 Review questions 6.18 Exercises 6.19 Problems 7 Time-varying electromagnetic fields 7.1 Introduction 7.2 Motional electromotive force 7.3 Faraday’s law of induction 7.4 Maxwell’s equation Faraday’s law 7.5 Self-inductance 7.6 Mutual inductance 7.7 Inductance of coupled coils 7.8 Energy in a magnetic field 7.9 Maxwell’s equation from Amp`ere’s law 7.10 Maxwell’s equations from Gauss’s laws 7.11 Maxwell’s equations and boundary conditions 7.12 Poynting’s theorem 7.13 Time-harmonic fields 7.14 Applications of electromagnetic fields 7.15 Summary 7.16 Review questions 7.17 Exercises 7.18 Problems 8 Plane wave propagation 8.1 Introduction 8.2 General wave equations 8.3 Plane wave in a dielectric medium 8.4 Plane wave in free space 8.5 Plane wave in a conducting medium 8.6 Plane wave in a good conductor 8.7 Plane wave in a good dielectric 8.8 Polarization of a wave 8.9 Normal incidence of uniform plane waves 8.10 Oblique incidence on a plane boundary 8.11 Summary 8.12 Review questions 8.13 Exercises 8.14 Problems 9 Transmission lines 9.1 Introduction 9.2 A parallel-plate transmission line 9.3 Voltage and current in terms of sending-end and receiving-end variables 9.4 The input impedance 9.5 Reflections at discontinuity points along transmission lines 9.6 Standing waves in transmission lines 9.7 Impedance matching with shunt stub lines 9.8 Transmission lines with imperfect materials 9.9 Transients in transmission lines 9.10 Skin effect and resistance 9.11 Summary 9.12 Review questions 9.13 Exercises 9.14 Problems 10 Waveguides and cavity resonators 10.1 Introduction 10.2 Wave equations in Cartesian coordinates 10.3 Transverse magnetic TM mode 10.4 Transverse electric TE mode 10.5 Losses in a waveguide 10.6 Cavity resonators 10.7 Summary 10.8 Review questions 10.9 Exercises 10.10 Problems 11 Antennas 11.1 Introduction 11.2 Wave equations in terms of potential functions 11.3 Hertzian dipole 11.4 A magnetic dipole 11.5 A short dipole antenna 11.6 A half-wave dipole antenna 11.7 Antenna arrays 11.8 Linear arrays 11.9 Efficiency of an antenna 11.10 Receiving antenna and Friis equation 11.11 The radar system 11.12 Summary 11.13 Review questions 11.14 Exercises 11.15 Problems 12 Computer-aided analysis of electromagnetic fields 12.1 Introduction 12.2 Finite-difference method 12.3 Finite-element method 12.4 Method of moments 12.5 Summary 12.6 Review questions 12.7 Exercises 12.8 Problems Appendix A Smith chart and its applications Appendix B Computer programs for various problems Appendix C Useful mathematical tables Index
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