# The Ultimate Guide to Electromagnetic Waves by R Shevgaonkar PDF

## Electromagnetic Waves by R Shevgaonkar PDF: A Comprehensive Guide

Electromagnetic waves are one of the most fascinating phenomena in nature. They are responsible for transmitting light, heat, radio, television, mobile phones, radar, GPS, X-rays, microwaves and many other forms of energy. They are also essential for understanding the structure and behavior of matter, atoms, molecules, crystals, plasmas and stars.

## electromagnetic waves by r shevgaonkar pdf

But how do electromagnetic waves work? How do they propagate, reflect, refract, polarize, interfere and diffract? How do they interact with different media such as vacuum, air, water, glass, metal and dielectric? How do they carry information and energy from one point to another? How do they radiate from antennas and receive by receivers?

If you want to learn the answers to these questions and more, you need a good book that explains the theory and applications of electromagnetic waves in a clear, concise and comprehensive way. And that book is Electromagnetic Waves by R Shevgaonkar.

In this article, we will give you a detailed overview of this book. We will tell you who is the author, what are the main topics covered in the book, how are they organized and why you should read it. We will also provide you with some sample content from each chapter to give you a taste of what you can expect from this book. By the end of this article, you will have a good idea of what this book can offer you and how you can download it as a PDF file.

## Chapter 1: Fundamentals of Electromagnetic Waves

The first chapter of the book introduces the basic concepts and principles of electromagnetic waves. It starts with a review of Maxwell's equations, which are the four differential equations that describe how electric and magnetic fields are generated and changed by each other and by electric charges and currents. It then explains the boundary conditions that apply to these fields when they encounter a change in medium or a surface.

Next, the chapter derives the wave equation, which is a partial differential equation that describes how electromagnetic waves propagate in space and time. It shows how to find the general and particular solutions of this equation for different cases, such as homogeneous and inhomogeneous media, source-free and source-present regions, and one-dimensional and three-dimensional spaces. It also introduces the concept of phasors, which are complex numbers that represent the amplitude and phase of sinusoidal waves.

The chapter then discusses the polarization, phase and amplitude of electromagnetic waves. It defines what polarization is and how it can be classified into linear, circular and elliptical types. It also explains how to represent polarization using Jones vectors and matrices, and how to change polarization using devices such as polarizers, wave plates and retarders. It also defines what phase and amplitude are and how they affect the intensity and interference of electromagnetic waves.

The chapter concludes with a discussion of the energy and momentum of electromagnetic waves. It defines what energy density, energy flux, Poynting vector, power and intensity are and how they relate to the electric and magnetic fields of electromagnetic waves. It also defines what momentum density, momentum flux, radiation pressure and radiation force are and how they affect the motion and deformation of objects exposed to electromagnetic waves.

## Chapter 2: Plane Waves in Lossless Media

The second chapter of the book focuses on plane waves in lossless media. Plane waves are electromagnetic waves that have constant amplitude and phase along planes perpendicular to the direction of propagation. Lossless media are media that do not absorb or dissipate electromagnetic energy.

The chapter begins with a derivation of the propagation constant, intrinsic impedance, phase velocity and wavelength of plane waves in free space and dielectric media. Free space is a vacuum that has no electric charges or currents, while dielectric media are non-conducting materials that have electric polarization. The chapter shows how these parameters depend on the frequency, permittivity and permeability of the medium.

Next, the chapter analyzes the reflection and refraction of plane waves at normal and oblique incidence. Normal incidence is when the plane wave hits a boundary between two media at right angles, while oblique incidence is when it hits at any other angle. The chapter shows how to calculate the reflected and transmitted waves using the boundary conditions, Snell's law, Fresnel's equations and power coefficients. It also introduces the concepts of Brewster angle, total internal reflection and critical angle.

## Chapter 3: Plane Waves in Lossy Media

The third chapter of the book deals with plane waves in lossy media. Lossy media are media that absorb or dissipate electromagnetic energy due to electric conductivity or magnetic losses.

The chapter starts with a derivation of the propagation constant, intrinsic impedance, phase velocity and wavelength of plane waves in conducting media. Conducting media are materials that have free electric charges or currents that respond to applied electric fields. The chapter shows how these parameters depend on the frequency, permittivity, permeability and conductivity of the medium. It also introduces the concepts of skin depth, attenuation constant and phase constant.

Next, the chapter analyzes the reflection and transmission of plane waves at a lossy interface. A lossy interface is a boundary between two lossy media that have different propagation constants and intrinsic impedances. The chapter shows how to calculate the reflected and transmitted waves using the boundary conditions, Snell's law, Fresnel's equations and power coefficients. It also introduces the concept of surface impedance.

The chapter concludes with a discussion of surface waves. Surface waves are electromagnetic waves that propagate along a lossy interface with exponentially decaying fields in both media. The chapter shows how to derive the dispersion relation, propagation constant, intrinsic impedance, phase velocity and wavelength of surface waves for different types of interfaces, such as metal-air, metal-dielectric and dielectric-dielectric interfaces.

## Chapter 4: Waveguides

The fourth chapter of the book covers waveguides. Waveguides are structures that confine and guide electromagnetic waves along a certain direction.

The chapter begins with a general concept of waveguides and modes. Modes are distinct solutions of the wave equation that satisfy the boundary conditions imposed by the waveguide structure. The chapter explains how to classify modes into transverse electric (TE), transverse magnetic (TM) and transverse electromagnetic (TEM) types based on their field components.

Next, the chapter studies rectangular wave 71b2f0854b