Overview

A timely and authoritative update to a leading text on the applied electromagnetics of transmission lines In the newly revised second edition of Applied Electromagnetics: Early Transmission Lines Approach, experienced engineer and professor Stuart Wentworth delivers an up-to-date and authoritative discussion of the electromagnetic foundations of signal transmission. The book explains practical applications for wireless systems, transmission lines, waveguides (including optical fiber), and antennas. Wentworth provides a detailed theoretical grounding of the subject and combines it with hands-on MATLAB simulations available on the web that help students understand critical concepts. Brand-new end-of-chapter problems at a broad range of difficulty levels Many more drill and example problems Worked solutions provided on the companion website Extensively updated material as well as entirely new material on metamaterials and patch antennas Perfect for undergraduate students of electrical engineering, Applied Electromagnetics: Early Transmission Lines Approach will also benefit researchers and educators in electrical engineering.

Full Product Details

Author:   Stuart M. Wentworth (Auburn University)
Publisher:   John Wiley & Sons Inc
Imprint:   John Wiley & Sons Inc
ISBN:  

9781394243136

ISBN 10:   1394243138
Pages:   656
Publication Date:   03 July 2025
Audience:   College/higher education ,  Professional and scholarly ,  Tertiary & Higher Education ,  Professional & Vocational
Format:   Hardback
Publisher's Status:   Active
Availability:   Awaiting stock  
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Table of Contents

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 Dynamic Fields 348 5.1 Current Continuity and Relaxation Time 349 5.2 Faraday’s Law and Transformer Emf 352 Transformer EMF 355 Transformers 359 Point Form of Faraday’s Law 362 5.3 Faraday’s Law and Motional Emf 362 Generators 368 5.4 Displacement Current 370 5.5 Maxwell’s Equations 375 5.6 Lossless Tem Waves 376 5.7 Time-Harmonic Fields and Phasors 381 Summary 385 Problems 386 Chapter 6 Plane Waves 391 6.1 General Wave Equations 393 Time-Harmonic Wave Equations 394 Propagating Fields Relation 398 6.2 Propagation in Lossless, Charge-Free Media 400 6.3 Propagation in Dielectrics 402 Low-Loss Dielectrics 405 Loss Tangent 406 6.4 Propagation in Conductors 408 Current in Conductors 411 6.5 The Poynting Theorem and Power Transmission 416 UPW Power Transmission 418 6.6 Polarization 421 Linear Polarization 421 Circular Polarization 424 Elliptical Polarization 425 6.7 Reflection and Transmission at Normal Incidence 427 General Case 428 Standing Waves 433 6.8 Reflection and Transmission at Oblique Incidence 434 TE Polarization 436 TM Polarization 442 6.9 Waves in Metamaterials 448 Backward Waves 449 Negative Refraction 452 Summary 453 Suggested Bibliography 455 Problems 455 Chapter 7 Waveguides 461 7.1 Dielectric Waveguide 463 Boundary Reflection 467 Dielectric Waveguide Modes 469 Field Patterns 476 7.2 Rectangular Waveguide Fundamentals 478 Wave Propagation 482 Waveguide Impedance 486 Waveguide Field Equations 487 Practical Application: Microwave Ovens 490 7.3 Optical Fiber 492 Numerical Aperture 496 Signal Degradation 498 Attenuation 498 Graded-Index Fiber 499 7.4 Fiber-Optic Communication Systems 500 Optical Sources 501 Optical Detectors 503 Repeaters and Optical Amplifiers 505 Connections 506 7.5 Optical Link Design 508 Power Budget 508 Rise-Time Budget 509 Summary 513 Suggested Bibliography 515 Problems 515 Chapter 8 Antennas 518 8.1 General Properties 520 Radiated Power 520 Radiation Patterns 521 Directivity 524 Impedance and Efficiency 528 Parabolic Reflectors 532 Commercial Antenna 532 8.2 Electrically Short Antennas 535 Vector Magnetic Potential 535 The Hertzian Dipole 539 Small Loop Antenna 544 8.3 Dipole Antennas 546 Derivation of Fields 546 Half-Wave Dipole 549 Folded Dipole Antennas 555 8.4 Monopole Antennas 555 Image Theory 556 Antenna Properties 557 Practical Considerations 559 8.5 Patch Antennas 560 8.6 Antenna Arrays 569 Pair of Hertzian Dipoles 570 N-Element Linear Arrays 577 Parasitic Arrays 579 Microstrip Patch Arrays 581 8.7 The Friis Transmission Equation 586 Polarization Loss Factor 591 The General Friis Transmission Equation 593 Circular Polarization 595 Receiver Matching 597 8.8 Radar 599 Doppler Frequency Shift 602 Summary 603 Suggested Bibliography 607 Problems 608 Appendix A Vector Relations 615 Appendix B Coordinate System Transformations 618 Appendix C Complex Numbers 622 Appendix D Integrals, Conversions, and Constants 624 Appendix E Material Properties 627 Index 631

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Author Information

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.

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