Preface to the Second Edition
Since the first edition of this book was published almost 10 years ago, radio frequency design techniques and applications have continued to rapidly expand. Readers of this second edition will find many changes from the first edition such as expansion of power amplifiers, oscillator phase noise, and impedance matching and deletion of other material. Some chapters and sections have been rearranged to provide a more logical flow. In particular, the chapter on noise now precedes the chapter on class A amplifiers. However, when this book is used in our course on radio frequency circuits, students are asked to do a design project using the software, Advanced Design System, from Agilent. It has been found helpful for students to start their project after understanding basic amplifier design and then treat the noise problem in their design subsequently. Throughout the book, design examples are given based on the text. Source code for the programs illustrated in the text are available at the website given in Chapter 1. These programs should be helpful to the working engineer in need of a quick solution and to the student wishing to understand some of the details in a computation.
I wish to acknowledge the many contributions made by Krishna K. Agarwal in the first edition of this book and the contributions to the class E power amplifier section by William Cantrell in this edition. I also wish to acknowledge the valuable suggestions given by the reviewers.
W. ...
