Theory of Waveguides and Transmission Lines

Edward F. Kuester

• Publisher: CRC Press
• Year: 2020
• Print ISBN: 9780367540449
• eBook ISBN: 9781498730945
• Edition: 1
• Topic: Technology & Engineering
• Subtopic: Electrical Engineering & Telecommunications
• Index: Technology & Engineering

This book covers the principles of operation of electromagnetic waveguides and transmission lines. The approach is divided between mathematical descriptions of basic behaviors and treatment of specific types of waveguide structures. Classical (distributed-network) transmission lines, their basic properties, their connection to lumped-element networks, and the distortion of pulses are discussed followed by a full field analysis of waveguide modes. Modes of specific kinds of waveguides - traditional hollow metallic waveguides, dielectric (including optical) waveguides, etc. are discussed. Problems of excitation and scattering of waveguide modes are addressed, followed by discussion of real systems and performance.

1Modes of a Classical Transmission Line

1.1Introduction

In the broadest sense, all of electrical engineering deals with some sort of guided-wave system. Maxwell’s equations and Poynting’s theorem indicate to us that, even in an elementary low-frequency circuit, energy is stored and power is transferred, not by wires or circuit elements, but by the electromagnetic fields surrounding them. The configurations themselves serve merely to “arrange” or “guide” the fields in an advantageous manner. As operating frequency increases, this physical picture remains the same, but the quasi-static approximation of circuit theory which was useful at lower frequencies breaks down. Moreover, the electrical parameters of materials generally change at higher frequencies (conductors become more lossy, atomic and molecular vibrations begin to influence the dielectric properties, and so on). Circuits designed on quasi-static principles no longer operate efficiently, and new structures, along with new methods to analyze them, must be found.

In this same broad context, of course, antennas could also be thought of as guided-wave structures, especially so if designed with a highly directional pattern. The advantage of an antenna in a communication system is that no structure need be erected over a long distance. However, even in the best antenna systems it is difficult to achieve a really good degree of “guidance”, and tens or hundreds of dB of signal may be lost as a result. This is in part because no actual antenna guides a signal in a single direction exclusively, a...

Table of contents

• Cover
• Half Title
• Title Page
• Copyright Page
• Dedication
• Contents
• Preface
• Author
• Chapter 1: Modes of A Classical Transmission Line
• Chapter 2: Multiport Network Theory: Matrix Descriptions
• Chapter 3: Classical Transmission Lines: Excitation and Coupling
• Chapter 4: Pulse Propagation and Distortion
• Chapter 5: Hollow Metallic Waveguides
• Chapter 6: Surface Wave Modes: Basic Optical Waveguides
• Chapter 7: Transverse Resonance in Guided Wave Structures
• Chapter 8: Tem and Quasitem Modes: Basic Planar Transmission Lines
• Chapter 9: Orthogonality, Power Flow and Waveguide Losses
• Chapter 10: Excitation of Waveguides
• Chapter 11: Network Theory for Guided Waves
• Chapter 12: Coupled-Mode Theory
• Chapter 13: Resonant Elements for Circuits and Waveguides
• Appendix A: Properties of Solutions to Network and Transmission Line Equations
• Appendix B: Formulas from Vector, Matrix and Dyadic Analysis
• Appendix C: Special Functions
• Appendix D: Properties of Solutions to Maxwell's equations
• Appendix E: Electromagnetic Material Properties
• Appendix F: Exponential Lines, Bessel Lines and Turning Points
• Appendix G: Fourier and Laplace Transforms and Other Mathematical Data
• Appendix H: Modes in Hollow Waveguides with Zero Cutoff Frequency
• Appendix I: Field Line Plotting
• Appendix J: Integral Identities for Fields of Guided Modes
• Appendix K: Numerical Solution of Implicit Equations
• Appendix L: Derivation of the Surface Impedance for A Good Conductor
• Appendix M: Change in Inductance due to Deformation of Boundary
• Appendix N: Correction of Small Obstacle and Small Hole Theory for Boundary Effects
• Appendix O: Overlap Integrals for Coupledmode Theory
• Bibliography
• Index