Applied Electromagnetics - Wentworth, Stuart M.

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Résumé :

About the Author xi

Preface xii

Acknowledgments xvii

About the Companion Website xviii

Chapter 1

Introduction 1

1.1 Electromagnetic Fields 3

Electric Fields 3

Magnetic Fields 6

Field Linkage 8

1.2 Electromagnetic Spectrum 9

1.3 Numeric Considerations 11

1.4 Wireless Communications 14

1.5 Wave Fundamentals 16

1.6 Phasors 22

Summary 25

Problems 25

Chapter 2

Transmission Lines 27

2.1 Distributed-Parameter Model 29

Coaxial Cable 31

Telegraphist's Equations 35

2.2 Time-Harmonic Waves on Transmission Lines 37

Characteristic Impedance 41

Lossless Line 43

2.3 Power Transmission 45

2.4 Terminated T-Lines 49

Voltage Standing Wave Ratio 50

Input Impedance 52

Complex Loads 54

Special Terminations 55

2.5 The Complete Circuit 58

2.6 The Smith Chart 63

T-Line Calculator 69

Impedance Measurement 73

2.7 Impedance Matching 79

Quarter-Wave Transformer 79

Simple Matching with the Smith Chart 80

Admittance of Shunt Stubs 83

Shunt-Stub Matching 87

Lumped Element Matching 92

2.8 Microstrip 102

Other Planar T-lines 107

2.9 Transients 108

Pulse Response 113

Practical Application: Schottky Diode Terminations 116

Reactive Loads 117

Time Domain Reflectometry 120

2.10 Dispersion 123

Fourier Series of a Rectangular Pulse 124

Fourier Series of a Trapezoidal Pulse 125

Dispersion of Trapezoidal Pulse 127

Summary 128

Suggested References 130

Problems 130

Chapter 3

Electrostatics 138

3.1 Vectors in The Cartesian Coordinate System 140

Differential Elements 145

3.2 Coulomb's Law 146

Electric Field Intensity 151

Field Lines 153

3.3 Spherical Coordinate System 153

3.4 Line Charges and The Cylindrical Coordinate System 159

Infinite Length Line of Charge 161

Ring of Charge 167

3.5 Surface and Volume Charge 169

Volume Charge 174

Practical Application: Laser Printer 176

3.6 Electric Flux Density 177

3.7 Gauss's Law and Applications 182

Coaxial Cable 187

3.8 Divergence and The Point Form of Gauss's Law 190

3.9 Electric Potential 196

Gradient 201

3.10 Conductors and Ohm's Law 205

Current and Current Density 207

Joule's Law 210

3.11 Dielectrics 212

Practical Application: Electret Microphone 217

3.12 Boundary Relations 218

3.13 Boundary Value Problems 223

3.14 Capacitance 231

Electrostatic Potential Energy 235

Practical Application: Electrolytic Capacitors 237

Summary 238

Problems 240

Chapter 4

Magnetostatics 250

4.1 Magnetic Fields and The Cross Product 251

Oersted's Experiment 258

4.2 Biot-Savart's Law 258

Solenoid 264

Surface and Volume Current Densities 267

4.3 Ampere's Circuit Law 270

4.4 Curl and The Point Form of Ampere's Circuit Law 280

Stokes' Theorem 284

4.5 Magnetic Flux Density 287

4.6 Magnetic Forces 289

Force on a Current Element 292

Magnetic Torque and Moment 296

Practical Application: Loudspeakers 301

4.7 Magnetic Materials 303

4.8 Boundary Conditions 309

4.9 Inductance and Magnetic Energy 314

Mutual Inductance 319

Magnetic Energy 321

4.10 Magnetic Circuits 326

Electromagnets 333

Practical Application: Maglev 335

Summary 337

Problems 340

Chapter 5

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Biographie:

Stuart M. Wentworth, PhD, is Assistant Professor Alumni at Auburn University, having retired in 2023 after 33 years of service in the Electrical and Computer Engineering Department. His research focused on antennas, microwave circuit and interconnect modeling, and high frequency material characterization....