Stephen A. Maas earned his Ph.D. in electrical engineering from UCLA. Dr. Maas is president of Nonlinear Technologies, Inc., California, a high-tech consulting company specializing in the design and analysis of nonlinear and low-noise RF/microwave components and systems. The Artech House series editor of microwave technology, he is also the author of The RF and Microwave Circuit Design Cookbook, C/NL for Windows 95, NT and 3.1: Version 1.2, and Microwave Mixers, Second Edition (Artech House 1998, 1996, 1993).