Preface
When I started 2 years ago to write a book on wireless technology—specifically, circuit design—I had hoped that the explosion of the technology had stabilized. To my surprise, however, the technology is far from settled, and I found myself in a constant chase to catch up with the latest developments. Such a chase requires a fast engine like the Concorde.
In the case of this somewhat older technology, speed still has not been surpassed by any other commercial approach. This tells us there is a lot of design technology that needs to be understood or modified to handle today's needs. Because of the very demanding calculation effort for the circuits, this book makes heavy use of the most modern CAD tools. Hewlett-Packard1 was kind enough to provide us with a copy of their advanced design system (ADS), which also comes with matching synthesis and a wideband CDMA library. Unfortunately, some of the mechanics of getting us started on the software collided with the already delayed schedule of this book, and we were only in a position to reference their advanced capability and not really demonstrate it. The use of this software, including the one from Eagleware, which was also provided to us, needed to be deferred to the next edition of this book. To meet time constraints and give a consistent presentation, we decided to stay with the Ansoft tools. One of the most time-consuming ...
