Wireless and Guided Wave Electromagnetics

Fundamentals and Applications

Le Nguyen Binh

• Publisher: CRC Press
• Year: 2017
• Print ISBN: 9781439847534
• eBook ISBN: 9781351833387
• Edition: 1
• Topic: Technology & Engineering
• Subtopic: Electrical Engineering & Telecommunications
• Index: Technology & Engineering

Wireless communications allow high-speed mobile access to a global Internet based on ultra-wideband backbone intercontinental and terrestrial networks. Both of these environments support the carrying of information via electromagnetic waves that are wireless (in free air) or guided through optical fibers. Wireless and Guided Wave Electromagnetics: Fundamentals and Applications explores the fundamental aspects of electromagnetic waves in wireless media and wired guided media. This is an essential subject for engineers and physicists working with communication technologies, mobile networks, and optical communications.

This comprehensive book:

• Builds from the basics to modern topics in electromagnetics for wireless and optical fiber communication
• Examines wireless radiation and the guiding of optical waves, which are crucial for carrying high-speed information in long-reach optical networking scenarios
• Explains the physical phenomena and practical aspects of guiding optical waves that may not require detailed electromagnetic solutions
• Explores applications of electromagnetic waves in optical communication systems and networks based on frequency domain transfer functions in the linear regions, which simplifies the physical complexity of the waves but still allows them to be examined from a system engineering perspective
• Uses MATLAB® and Simulink® models to simulate and illustrate the electromagnetic fields
• Includes worked examples, laboratory exercises, and problem sets to test understanding

The book's modular structure makes it suitable for a variety of courses, for self-study, or as a resource for research and development. Throughout, the author emphasizes issues commonly faced by engineers. Going a step beyond traditional electromagnetics textbooks, this book highlights specific uses of electromagnetic waves with a focus on the wireless and optical technologies that are increasingly important for high-speed transmission over very long distances.

1 Electric and Magnetic Fields and Waves

1.1 Brief Overview

Electromagnetic waves always consist of two orthogonal vectorial components, the electric and magnetic fields, whether they are in wireless or guided media. They are normally induced by the excitation from a time-varying source. Thus, in this chapter the time-varying electric and magnetic (EM) fields are described. That means the interdependence and dynamics of the electromagnetic fields and the formation and propagation of plane waves are assumed, which is important for the radiation, guiding, and propagation through either wireless or guided media. Essential fundamental understandings of the vector analyses are given.

The word field has been commonly used in several textbooks and published works since the generalization works by Maxwell. It indicates the strength of the electric or magnetic force and the spatial region under its influence.

1.2 Wave Representation

1.2.1 Overview

EM radiation is the electrodynamics of the electric and magnetic fields. Both components obey the principle of superposition when the medium in which they behave is linear. Thus, a field due to the time-varying electric or magnetic field will influence the property of the EM field strength of the medium. So what is the relationship between the variations of these two fields under the time-varying condition?

Maxwell derived a waveform of the electric and magnetic equations that constitute the wave-like nature of the electric and magnetic fields and their symmetric property. The speed of EM waves concurs with that of the measured speed of light; thus Maxwell concluded that the light itself is an EM wave. This conclusion has been extensively employed over the last century and currently is used in the guiding of lightwaves in optical fibers for ultra-high-speed optical communications. Later sections of this chapter will give insight into the derivation of the wave propagation equations and Maxwell’s equations.

Accordingly, based on Maxwell’s equations a spatially varying electric field will enforce the variation of the magnetic field over time. Likewise for the change relationship, when there exists a spatial...

Table of contents

• Cover
• Half Title
• Title Page
• Copyright Page
• Dedication
• Table of Contents
• Preface
• Acknowledgments
• About the Author
• Chapter 1 Electric and Magnetic Fields and Waves
• Chapter 2 Electrical Transmission Lines
• Chapter 3 Antennae
• Chapter 4 Planar Optical Waveguides
• Chapter 5 Three-Dimensional Optical Waveguides
• Chapter 6 Optical Fibers: Single- and Few-Mode Structures and Guiding Properties
• Chapter 7 Optical Fiber Operational Parameters
• Chapter 8 Guided Wave Optical Transmission Lines: Transfer Functions
• Chapter 9 Fourier Guided Wave Optics
• Appendix: Vector Analysis
• Index