Acknowledgments

The work of R. Pogorzelski reported here was carried out at the Jet Propulsion Laboratory (JPL), California Institute of Technology under contract with the National Aeronautics and Space Administration (NASA) with additional funding from the U.S. Ballistic Missile Defense Organization (BMDO). Dr. Pogorzelski gratefully acknowledges support from the NASA/JPL Office of the Chief Scientist and Chief Technologist for the writing of this book. He further wishes to acknowledge the contribution of his co-workers at JPL as represented by their co-authorship of many of the references included here. In addition, he thanks Dr. Vahraz Jamnejad of JPL for helpful discussions concerning causality and coupling delay and Mr. Robert J. Beckon of JPL for his help with the cover graphic. Many of the results described here were either obtained or checked using Mathematica™ by Wolfram Research, Inc. (Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement by the United States Government or the Jet Propulsion Laboratory, California Institute of Technology.)

The work of A. Georgiadis has been supported by the Juan de la Cierva Program 2004, the Torres Quevedo Grant PTQ-06-02-0555, project TEC2008-02685/TEC on Novel Architectures for Reconfigurable Reflectarrays and Phased Array Antennas (NARRA) of the Ministry of Science and Innovation Spain, and the European COST Action IC0803 RF/Microwave Communication Subsystems for Emerging Wireless Technologies (RFCSET).

Dr. Georgiadis would like to especially acknowledge Dr. Ana Collado for her invaluable contribution in every aspect of the results presented in Part III of this book. Additionally, he would like to acknowledge Dr. Konstantinos Slavakis for his contribution associated with beamforming and optimization and for long discussions related to convex optimization. Finally, he would like to acknowledge Dr. Maurizio Bozzi and Francesco Giuppi from the University of Pavia and Selva Via from CTTC for their contribution in the recent development of coupled oscillator systems using substrate integrated waveguide (SIW) technology.

Lastly, both Dr. Pogorzelski and Dr. Georgiadis would like to acknowledge the tireless efforts of Mr. Roger V. Carlson of JPL in obtaining the permissions to reprint items from the literature and in editing the manuscript to conform to the format required by the publisher.

Ronald J. Pogorzelski
Apostolos Georgiadis