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Hayt,..Buck,.Engineering.Electromagnetics,.8ed,.MH,.jpg

ENGINEERING ELECTROMAGNETICS, EIGHTH EDITION
Published by McGraw-Hill, a business unit of The McGraw-Hill Companies, Inc., 1221 Avenue of the
Americas, New York, NY 10020. Copyright C 2012 by The McGraw-Hill Companies, Inc. All rights
reserved. Previous editions C 2006, 2001, and 1989. No part of this publication may be reproduced or
distributed in any form or by any means, or stored in a database or retrieval system, without the prior
written consent of The McGraw-Hill Companies, Inc., including, but not limited to, in any network or
other electronic storage or transmission, or broadcast for distance learning.
Some ancillaries, including electronic and print components, may not be available to customers outside
the United States.
This book is printed on acid-free paper.
1 2 3 4 5 6 7 8 9 0 DOC/DOC 1 0 9 8 7 6 5 4 3 2 1
ISBN 978-0-07-338066-7
MHID 0-07-338066-0
Vice President & Editor-in-Chief: Marty Lange
Vice President EDP/Central Publishing Services: Kimberly Meriwether David
Publisher: Raghothaman Srinivasan
Senior Sponsoring Editor: Peter E. Massar
Senior Marketing Manager: Curt Reynolds
Developmental Editor: Darlene M. Schueller
Project Manager: Robin A. Reed
Design Coordinator: Brenda A. Rolwes
Cover Design and Image: Diana Fouts
Buyer: Kara Kudronowicz
Media Project Manager: Balaji Sundararaman
Compositor: Glyph International
Typeface: 10.5/12 Times Roman
Printer: R.R. Donnelley
All credits appearing on page or at the end of the book are considered to be an extension of the copyright
page.
Library of Congress Cataloging-in-Publication Data
Hayt, William Hart, 1920–
Engineering electromagnetics / William H. Hayt, Jr., John A. Buck. — 8th ed.
p. cm.
Includes bibliographical references and index.
ISBN 978–0–07–338066–7 (alk. paper)
1. Electromagnetic theory. I. Buck, John A. II. Title.
QC670.H39 2010
530.141—dc22 2010048332



Preface xii
Chapter 1
Vector Analysis 1
1.1 Scalars and Vectors 1
1.2 Vector Algebra 2
1.3 The Rectangular Coordinate System 3
1.4 Vector Components and Unit Vectors 5
1.5 The Vector Field 8
1.6 The Dot Product 9
1.7 The Cross Product 11
1.8 Other Coordinate Systems: Circular
Cylindrical Coordinates 13
1.9 The Spherical Coordinate System 18
References 22
Chapter 1 Problems 22
Chapter 2
Coulomb’s Law and Electric
Field Intensity 26
2.1 The Experimental Law of Coulomb 26
2.2 Electric Field Intensity 29
2.3 Field Arising from a Continuous Volume
Charge Distribution 33
2.4 Field of a Line Charge 35
2.5 Field of a Sheet of Charge 39
2.6 Streamlines and Sketches of Fields 41
References 44
Chapter 2 Problems 44
Chapter 3
Electric Flux Density, Gauss’s Law,
and Divergence 48
3.1 Electric Flux Density 48
3.2 Gauss’s Law 52
3.3 Application of Gauss’s Law: Some
Symmetrical Charge Distributions 56
3.4 Application of Gauss’s Law: Differential
Volume Element 61
3.5 Divergence and Maxwell’s First Equation 64
3.6 The Vector Operator ∇ and the Divergence
Theorem 67
References 70
Chapter 3 Problems 71
Chapter 4
Energy and Potential 75
4.1 Energy Expended in Moving a Point Charge in
an Electric Field 76
4.2 The Line Integral 77
4.3 Definition of Potential Difference
and Potential 82
4.4 The Potential Field of a Point Charge 84
4.5 The Potential Field of a System of Charges:
Conservative Property 86
4.6 Potential Gradient 90
4.7 The Electric Dipole 95
4.8 Energy Density in the Electrostatic
Field 100
References 104
Chapter 4 Problems 105
vi
Contents vii
Chapter 5
Conductors and Dielectrics 109
5.1 Current and Current Density 110
5.2 Continuity of Current 111
5.3 Metallic Conductors 114
5.4 Conductor Properties and Boundary
Conditions 119
5.5 The Method of Images 124
5.6 Semiconductors 126
5.7 The Nature of Dielectric Materials 127
5.8 Boundary Conditions for Perfect
Dielectric Materials 133
References 137
Chapter 5 Problems 138
Chapter 6
Capacitance 143
6.1 Capacitance Defined 143
6.2 Parallel-Plate Capacitor 145
6.3 Several Capacitance Examples 147
6.4 Capacitance of a Two-Wire Line 150
6.5 Using Field Sketches to Estimate
Capacitance in Two-Dimensional
Problems 154
6.6 Poisson’s and Laplace’s Equations 160
6.7 Examples of the Solution of Laplace’s
Equation 162
6.8 Example of the Solution of Poisson’s
Equation: the p-n Junction Capacitance 169
References 172
Chapter 6 Problems 173
Chapter 7
The Steady Magnetic Field 180
7.1 Biot-Savart Law 180
7.2 Amp`ere’s Circuital Law 188
7.3 Curl 195
7.4 Stokes’ Theorem 202
7.5 Magnetic Flux and Magnetic Flux
Density 207
7.6 The Scalar and Vector Magnetic
Potentials 210
7.7 Derivation of the Steady-Magnetic-Field
Laws 217
References 223
Chapter 7 Problems 223
Chapter 8
Magnetic Forces, Materials,
and Inductance 230
8.1 Force on a Moving Charge 230
8.2 Force on a Differential Current Element 232
8.3 Force between Differential Current
Elements 236
8.4 Force and Torque on a Closed Circuit 238
8.5 The Nature of Magnetic Materials 244
8.6 Magnetization and Permeability 247
8.7 Magnetic Boundary Conditions 252
8.8 The Magnetic Circuit 255
8.9 Potential Energy and Forces on Magnetic
Materials 261
8.10 Inductance and Mutual Inductance 263
References 270
Chapter 8 Problems 270
Chapter 9
Time-Varying Fields and Maxwell’s
Equations 277
9.1 Faraday’s Law 277
9.2 Displacement Current 284
9.3 Maxwell’s Equations in Point Form 288
9.4 Maxwell’s Equations in Integral Form 290
9.5 The Retarded Potentials 292
References 296
Chapter 9 Problems 296
viii Contents
Chapter 10
Transmission Lines 301
10.1 Physical Description of Transmission Line
Propagation 302
10.2 The Transmission Line Equations 304
10.3 Lossless Propagation 306
10.4 Lossless Propagation of Sinusoidal
Voltages 309
10.5 Complex Analysis of Sinusoidal Waves 311
10.6 Transmission Line Equations and Their
Solutions in Phasor Form 313
10.7 Low-Loss Propagation 315
10.8 Power Transmission and The Use of Decibels
in Loss Characterization 317
10.9 Wave Reflection at Discontinuities 320
10.10 Voltage Standing Wave Ratio 323
10.11 Transmission Lines of Finite Length 327
10.12 Some Transmission Line Examples 330
10.13 Graphical Methods: The Smith Chart 334
10.14 Transient Analysis 345
References 358
Chapter 10 Problems 358
Chapter 11
The Uniform Plane Wave 367
11.1 Wave Propagation in Free Space 367
11.2 Wave Propagation in Dielectrics 375
11.3 Poynting’s Theorem and Wave Power 384
11.4 Propagation in Good Conductors:
Skin Effect 387
11.5 Wave Polarization 394
References 401
Chapter 11 Problems 401
Chapter 12
Plane Wave Reflection and
Dispersion 406
12.1 Reflection of Uniform Plane Waves
at Normal Incidence 406
12.2 Standing Wave Ratio 413
12.3 Wave Reflection from Multiple
Interfaces 417
12.4 Plane Wave Propagation in General
Directions 425
12.5 Plane Wave Reflection at Oblique Incidence
Angles 428
12.6 Total Reflection and Total Transmission
of Obliquely Incident Waves 434
12.7 Wave Propagation in Dispersive Media 437
12.8 Pulse Broadening in Dispersive Media 443
References 447
Chapter 12 Problems 448
Chapter 13
Guided Waves 453
13.1 Transmission Line Fields and Primary
Constants 453
13.2 Basic Waveguide Operation 463
13.3 Plane Wave Analysis of the Parallel-Plate
Waveguide 467
13.4 Parallel-Plate Guide Analysis Using the Wave
Equation 476
13.5 Rectangular Waveguides 479
13.6 Planar Dielectric Waveguides 490
13.7 Optical Fiber 496
References 506
Chapter 13 Problems 506
Chapter 14
Electromagnetic Radiation
and Antennas 511
14.1 Basic Radiation Principles: The Hertzian
Dipole 511
14.2 Antenna Specifications 518
14.3 Magnetic Dipole 523
14.4 Thin Wire Antennas 525
14.5 Arrays of Two Elements 533
14.6 Uniform Linear Arrays 537
14.7 Antennas as Receivers 541
References 548
Chapter 14 Problems 548
Contents ix
Appendix A
Vector Analysis 553
A.1 General Curvilinear Coordinates 553
A.2 Divergence, Gradient, and Curl
in General Curvilinear Coordinates 554
A.3 Vector Identities 556
Appendix B
Units 557
Appendix C
Material Constants 562
Appendix D
The Uniqueness Theorem 565
Appendix E
Origins of the Complex
Permittivity 567
Appendix F
Answers to Odd-Numbered
Problems 574
Index 580

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