Elements of Electromagnetics

by Sadiku, Matthew N. O.

• ISBN13: 9780195134773
• ISBN10: 019513477X
• Edition: 3rd
• Format: Hardcover
• Copyright: 2000-08-31
• Publisher: Oxford University Press

Summary

Designed for the standard sophomore- and junior-level course in electromagnetics, Elements of Electromagnetics, 3/e, continues the highly regarded pedagogical tradition established by its successful previous editions. It offers students the most lucid and interesting presentation available offundamental concepts and applications in electromagnetics. Revised and updated, this third edition adds a new chapter on modern topics covering microwaves, electromagnetic interference and compatibility, fiber optics, and more. A solutions manual accompanies the text. Features DT Begins with vector analysis and applies it gradually throughout the text, avoiding the frequent interruptions that occur when mathematical background is interspersed sporadically throughout a text DT Incorporates many helpful pedagogical features including chapter introductions and summaries, boxed formulas, multiple-choice review questions, and thoroughly worked-out examples followed by practice exercises DT Treats mathematical theorems separately from physical concepts, making it easier for students to grasp the theorems DT Devotes an entire chapter to modern computer tools used in electromagnetics DT Motivates student learning with more than 100 illustrative examples and over 600 figures DT Provides a balanced presentation of time-varying fields and static fields, preparing students for employment in today's industrial and manufacturing sectors

Author Biography

Matthew N. O. Sadiku is Professor in the Department of Electrical and Computer Engineering at Temple University.

Table of Contents

Preface	xiii
A Note to the Student	xvi
PART 1: VECTOR ANALYSIS
Vector Algebra	3	(25)
Introduction	3	(1)
A Preview of the Book	4	(1)
Scalars and Vectors	4	(1)
Unit Vector	5	(1)
Vector Addition and Subtraction	6	(1)
Position and Distance Vectors	7	(4)
Vector Multiplication	11	(5)
Components of a Vector	16	(12)
Summary	22	(1)
Review Questions	23	(2)
Problems	25	(3)
Coordinate Systems and Transformation	28	(25)
Introduction	28	(1)
Cartesian Coordinates (x, y, z)	29	(1)
Circular Cylindrical Coordinates (ρ, &phis;, z)	29	(3)
Spherical Coordinates (r, &thetas;, z)	32	(9)
Constant-Coordinate Surfaces	41	(12)
Summary	46	(1)
Review Questions	47	(2)
Problems	49	(4)
Vector Calculus	53	(50)
Introduction	53	(1)
Differential Length, Area, and Volume	53	(7)
Line, Surface, and Volume Integrals	60	(3)
Del Operator	63	(2)
Gradient of a Scalar	65	(4)
Divergence of a Vector and Divergence Theorem	69	(6)
Curl of a Vector and Stokes's Theorem	75	(8)
Laplacian of a Scalar	83	(3)
Classification of Vector Fields	86	(17)
Summary	89	(1)
Review Questions	90	(3)
Problems	93	(10)
PART 2: ELECTROSTATICS
Electrostatic Fields	103	(58)
Introduction	103	(1)
Coulomb's Law and Field Intensity	104	(7)
Electric Fields due to Continuous Charge Distributions	111	(11)
Electric Flux Density	122	(2)
Gauss's Law---Maxwell's Equation	124	(2)
Applications of Gauss's Law	126	(7)
Electric Potential	133	(6)
Relationship between E and V---Maxwell's Equation	139	(3)
An Electric Dipole and Flux Lines	142	(4)
Energy Density in Electrostatic Fields	146	(15)
Summary	150	(3)
Review Questions	153	(2)
Problems	155	(6)
Electric Fields in Material Space	161	(38)
Introduction	161	(1)
Properties of Materials	161	(1)
Convection and Conduction Currents	162	(3)
Conductors	165	(6)
Polarization in Dielectrics	171	(3)
Dielectric Constant and Strength	174	(1)
Linear, Isotropic, and Homogeneous Dielectrics	175	(5)
Continuity Equation and Relaxation Time	180	(2)
Boundary Conditions	182	(17)
Summary	191	(1)
Review Questions	192	(2)
Problems	194	(5)
Electrostatic Boundary-Value Problems	199	(62)
Introduction	199	(1)
Poisson's and Laplace's Equations	199	(2)
Uniqueness Theorem	201	(1)
General Procedure for Solving Poisson's or Laplace's Equation	202	(21)
Resistance and Capacitance	223	(17)
Method of Images	240	(21)
Summary	246	(1)
Review Questions	247	(2)
Problems	249	(12)
PART 3: MAGNETOSTATICS
Magnetostatic Fields	261	(43)
Introduction	261	(2)
Biot--Savart's Law	263	(10)
Ampere's Circuit Law---Maxwell's Equation	273	(1)
Applications of Ampere's Law	274	(7)
Magnetic Flux Density---Maxwell's Equation	281	(2)
Maxwell's Equations for Static EM Fields	283	(1)
Magnetic Scalar and Vector Potentials	284	(6)
Derivation of Biot-Savart's Law and Ampere's Law	290	(14)
Summary	292	(1)
Review Questions	293	(3)
Problems	296	(8)
Magnetic Forces, Materials, and Devices	304	(65)
Introduction	304	(1)
Forces due to Magnetic Fields	304	(12)
Magnetic Torque and Moment	316	(2)
A Magnetic Dipole	318	(5)
Magnetization in Materials	323	(4)
Classification of Magnetic Materials	327	(3)
Magnetic Boundary Conditions	330	(6)
Inductors and Inductances	336	(3)
Magnetic Energy	339	(8)
Magnetic Circuits	347	(2)
Force on Magnetic Materials	349	(20)
Summary	354	(2)
Review Questions	356	(2)
Problems	358	(11)
PART 4: WAVES AND APPLICATIONS
Maxwell's Equations	369	(41)
Introduction	369	(1)
Faraday's Law	370	(2)
Transformer and Motional EMFs	372	(9)
Displacement Current	381	(3)
Maxwell's Equations in Final Forms	384	(3)
Time-Varying Potentials	387	(2)
Time-Harmonic Fields	389	(21)
Summary	400	(1)
Review Questions	401	(3)
Problems	404	(6)
Electromagnetic Wave Propagation	410	(63)
Introduction	410	(1)
Waves in General	411	(6)
Wave Propagation in Lossy Dielectrics	417	(6)
Plane Waves in Lossless Dielectrics	423	(1)
Plane Waves in Free Space	423	(2)
Plane Waves in Good Conductors	425	(10)
Power and the Poynting Vector	435	(5)
Reflection of a Plane Wave at Normal Incidence	440	(11)
Reflection of a Plane Wave at Oblique Incidence	451	(22)
Summary	462	(2)
Review Questions	464	(2)
Problems	466	(7)
Transmission Lines	473	(69)
Introduction	473	(1)
Transmission Line Parameters	474	(3)
Transmission Line Equations	477	(7)
Input Impedance, SWR, and Power	484	(8)
The Smith Chart	492	(13)
Some Applications of Transmission Lines	505	(7)
Transients on Transmission Lines	512	(12)
Microstrip Transmission Lines	524	(18)
Summary	528	(2)
Review Questions	530	(3)
Problems	533	(9)
Waveguides	542	(46)
Introduction	542	(1)
Rectangular Waveguides	543	(4)
Transverse Magnetic (TM) Modes	547	(5)
Transverse Electric (TE) Modes	552	(11)
Wave Propagation in the Guide	563	(2)
Power Transmission and Attenuation	565	(4)
Waveguide Current and Mode Excitation	569	(6)
Waveguide Resonators	575	(13)
Summary	581	(1)
Review Questions	582	(1)
Problems	583	(5)
Antennas	588	(50)
Introduction	588	(2)
Hertzian Dipole	590	(4)
Half-Wave Dipole Antenna	594	(4)
Quarter-Wave Monopole Antenna	598	(1)
Small Loop Antenna	599	(5)
Antenna Characteristics	604	(8)
Antenna Arrays	612	(9)
Effective Area and the Friis Equation	621	(4)
The Radar Equation	625	(13)
Summary	629	(1)
Review Questions	630	(2)
Problems	632	(6)
Modern Topics	638	(22)
Introduction	638	(1)
Microwaves	638	(6)
Electromagnetic Interference and Compatibility	644	(5)
Optical Fiber	649	(11)
Summary	656	(1)
Review Questions	656	(2)
Problems	658	(2)
Numerical Methods	660	(67)
Introduction	660	(1)
Field Plotting	661	(8)
The Finite Difference Method	669	(14)
The Moment Method	683	(11)
The Finite Element Method	694	(33)
Summary	713	(1)
Review Questions	714	(2)
Problems	716	(11)
Appendix A Mathematical Formulas	727	(10)
Appendix B Material Constants	737	(3)
Appendix C Answers to Odd-Numbered Problems	740	(23)
Index	763