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Informationen zum Autor RONALD J. POGORZELSKI, PhD, is Senior Research Scientist Emeritus and the former supervisor of the Spacecraft Antenna Research Group at the Jet Propulsion Laboratory. He has authored or coauthored over 100 technical publications and presentations and was editor of the IEEE Transactions on Antennas and Propagation . APOSTOLOS GEORGIADIS, PhD, is a Senior Research Associate at Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) in Barcelona, Spain, where he is involved in active antennas and antenna arrays as well as RFID technology and energy harvesting. Klappentext Describing an innovative approach to phased-array control in antenna designThis book explores in detail phased-array antennas that use coupled-oscillator arrays, an arrangement featuring a remarkably simple beam steering control system and a major reduction in complexity compared with traditional methods of phased-array control. It brings together in one convenient, self-contained volume the many salient research results obtained over the past ten to fifteen years in laboratories around the world, including the California Institute of Technology's Jet Propulsion Laboratory.The authors examine the underlying theoretical framework of coupled-oscillator systems, clearly explaining the linear and nonlinear formalisms used in the development of coupled-oscillator arrays, while introducing a variety of state-of-the-art methodologies, design solutions, and tools for applying this control scheme. Readers will find:* Numerous implementation examples of coupled-oscillator array prototypes* A continuum model that permits application of diffusion theory to the analysis of phase dynamics* A demonstration of the array behavior through experimental results that validate the linearized theory* Examples of how incorporating coupling delay restores causality, including the latest published results* Guidance on how to accurately analyze and optimize coupled-oscillator arrays using modern simulation tools* A review of current developments, including the design of compact couple-oscillator array antennasComplete with 150 diagrams and photographs, Coupled-Oscillator Based Active-Array Antennas is a highly useful tutorial for antenna designers and a valuable reference for researchers and engineers wishing to learn about this cutting-edge technology. Zusammenfassung Describing an innovative approach to phased-array control in antenna design This book explores in detail phased-array antennas that use coupled-oscillator arrays, an arrangement featuring a remarkably simple beam steering control system and a major reduction in complexity compared with traditional methods of phased-array control. Inhaltsverzeichnis Foreword xi Preface xiii Acknowledgments xvii Authors xix PART I: THEORY AND ANALYSIS 1 Chapter 1 Introduction-Oscillators and Synchronization 3 1.1 Early Work in Mathematical Biology and Electronic Circuits 3 1.2 van der Pol's Model 5 1.3 Injection Locking (Adier's Formalism) and Its Spectra (Locked and Unlocked) 7 1.4 Mutual Injection Locking of Two Oscillators 21 1.5 Conclusion 26 Chapter 2 Coupled-Oscillator Arrays-Basic Analytical Description and Operating Principles 27 2.1 Fundamental Equations 28 2.2 Discrete Model Solution (Linearization and Laplace Transformation) 31 2.3 Steady-State Solution 37 2.4 Stability of the Phase Solution in the Full Nonlinear Formulation 41 2.5 External Injection Locking 46 2.6 Generalization to Planar Arrays 50 2.7 Coupling Networks 54 2.8 Conclusion 66 Chapter 3 The Continuum Model for Linear Arrays 67 3.1 The Linear Array without External Injection 68 3.2 The Linear Array with External Injection 81 3.3 Beam-Steering via End Detuning 93
