Electromagnetism for Engineers

An easily accessible textbook to introduce the power of electromagnetism

Electromagnetism can be a difficult subject to grasp and to teach. Much of what we take for granted in modern life is enabled by electromagnetic effects, but it isn’t always easy to understand the impact of electromagnetism compared to other areas of engineering, such as mechanics, which are more tangibly observed and felt. Although electromagnetism is a crucial and important branch of physics with elegant mathematics, many students can find the study of electromagnetism inaccessible.

It is crucial for students of electrical and electronic engineering and physics to have a strong understanding of electromagnetism and how it impacts communications, power generation and transmission, semiconductor devices, motors, and more. Electromagnetism for Engineers aims to develop a student’s understanding of electromagnetism in the context of real effects and how they apply to such applications, whilst maintaining the sophistication of the mathematics that can be used to give deeper insight. It begins by describing the fundamentals of electromagnetism before a more detailed discussion of the basic concepts developed for specific application areas. It then considers the application of electromagnetism to transmission lines, antennas, and waveguides.

Electromagnetism for Engineers readers will find:

• A unique approach that illustrates the link between real-life applications and fundamental theory of electromagnetism
• Clear, concise language to help students gain a full understanding of the subject
• Carefully designed figures to illustrate points throughout the book
• Accompanying website at www.wiley.com/go/flewitt1418

Electromagnetism for Engineers has been written as a textbook for undergraduates studying electronic or electrical engineering. The manual can also be of interest to physics students and??to graduate-level students desirous of having a general book on electromagnetism. It is also a useful reference for professional engineers looking for a refresher on the fundamentals of electromagnetism.

Andrew Flewitt, PhD CEng, is Professor of Electronic Engineering in Cambridge University Engineering Department and head of the Electrical Engineering Division. He graduated in Physics from the University of Birmingham before moving to Cambridge to carry out a PhD in Engineering investigating the growth of hydrogenated amorphous silicon thin films using scanning tunnelling microscopy. He was first appointed to a Lectureship in 2002. Current research interests encompass both large-area electronics and microelectromechanical systems. He is a Member of the Institute of Physics, a Member of the Institution of Engineering and Technology and is a Chartered Engineer.

Preface ix

Acknowledgements xi

About the Author xii

Symbols xiii

About the Companion Website xv

Part I Fundamentals of Electricity and Magnetism 1

1 Charge and Electric Fields 3

2 Electric Fields in Materials 15

3 Currents and Magnetic Fields 37

4 Magnetic Fields in Materials 51

5 The Maxwell Equations of Elecromagnetism 71

Part II Applications of Electromagnetism 83

6 Transmission Lines 85

7 Electromagnetic Waves in Dielectric Media 115

8 Antennas 131

9 Electromagnetic Waves at Dielectric Interfaces 143

10 Electromagnetic Waves in Conducting Media 161

11 Waveguides 173

12 Three-Phase Electrical Power 187

Epilogue 203

Index 205

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