The Book End

Open Electromagnetic Waveguides

T. Rozzi and M. Mongiardo
The Institute of Electrical Engineers
387 pages; $95

The dual properties of waveguide transmission and radiation in open structures are the principle features addressed in this book. Guided-wave electromagnetism and the effects of discontinuities in open, hybrid-mode, three-dimensional structures are examined using detailed real-world problems from the microwave, mm-wave and integrated-optics fields.

Chapter 1 defines different waveguide types and offers a brief overview of their practical applications. The chapter forms a quick reference guide to the characteristics of some electromagnetic open waveguides. Chapter 2 reviews classical electromagnetic theory and references some of the concepts frequently used throughout the book. Chapter 3 describes slab waveguides, the simplest form of open waveguide. Bound modes are also described and their spectra are derived.

Chapter 4 explains how bound modes of open waveguides play an important role in several applications. Their propagation characteristics are calculated using the effective dielectric constant at high frequencies and the conformal mapping technique at low frequencies. Chapter 5 introduces techniques for dealing with discontinuities in open waveguides. (The classical modal form is extended to waveguides with infinite cross section.) Chapter 6 discusses the transverse resonance technique applied to the problem of determining the bound modes of open waveguides of nonseparable cross section. Chapter 7 presents theoretical methods for computing the spectrum of open waveguides with nonseparable cross section. Chapter 8 analyzes these methods further and details examples of applications to familiarize the reader with the methodology of solving electromagnetic problems in actual open waveguides.

This book is of particular interest to engineers and scientists working with the simulation of integrated planar antennas, mm-wave circuits, integrated optics and other general open-waveguide structures. It is the first text to address the aspects of open-waveguide transmission and radiation in a single mathematical formalization.

To order this book, contact:
Inspec Dept., IEEE Operation Center,
P.O. Box 1331,
Piscataway, NJ 08855-1331
(908) 562-5553.

Computer-aided Analysis of Nonlinear Microwave Circuits

Paulo J.C. Rodrigues
Artech House Inc.
447 pages; $85, £68

The need to obtain detailed circuit behavior information before construction has become essential with the development of MMICs. As a result, MMIC technology has motivated the evolution of both linear and nonlinear circuit analysis tools. The purpose of this book is to present techniques used in computer-aided analysis of nonlinear microwave circuits. The text is oriented toward simulator development, but also is useful to nonlinear circuit simulator users who wish to understand how these simulators operate.

Chapter 1 presents basic concepts of nonlinear microwave circuits and introduces circuit analysis methods. These procedures are separated into time-domain methods where signal waveforms are computed by numerically solving differential equations and frequency-domain methods where steady-state solutions of circuit equations are described by signal spectra. Chapters 2 and 3 describe nonlinear device model development. Traditional equivalent-circuit models are covered and physical models suitable for nonlinear analysis are discussed.

Chapter 4 presents circuit equation formulation methods using resistive circuits as examples. Chapter 5 describes methods for solving systems of nonlinear algebraic equations. Time-domain methods for nonlinear circuit simulation are detailed in Chapter 6. The logic behind qualifying only a few integration methods for use in general-purpose simulators is explained. Chapter 7 discusses frequency-domain methods with an emphasis on harmonic balance. Fourier transform computation is described and an analysis of the harmonic balance equations is presented. The process of converting the presented material into effective software is demonstrated in Chapter 8, and Chapter 9 illustrates the results of simulation.

Understanding the methodology of nonlinear circuit simulators will ultimately enhance the reader's ability to effectively use these essential tools. The book helps reduce any apprehension and confusion when first applying these techniques.

To order this book, contact:
Artech House Inc.,
685 Canton St.,
Norwood, MA 02062
(781) 769-9750, ext. 4002; or

Portland House,
Stag Place,
London SW1E 5XA, UK
+44 (0) 171 973 8077.