Coupled-Oscillator Based Active-Array Antennas

**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. 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 antennas Complete 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. Content: Chapter 1 Introduction—Oscillators and Synchronization (pages 1–26): Chapter 2 Coupled?Oscillator Arrays—Basic Analytical Description and Operating Principles (pages 27–66): Chapter 3 The Continuum Model for Linear Arrays (pages 67–102): Chapter 4 The Continuum Model for Planar Arrays (pages 103–137): Chapter 5 Causality and Coupling Delay (pages 139–173): Chapter 6 Experimental Validation of the Theory (pages 175–215): Chapter 7 Perturbation Models for Stability, Phase Noise, and Modulation (pages 217–261): Chapter 8 Numerical Methods for Simulating Coupled?Oscillator Arrays (pages 263–296): Chapter 9 Beamforming in Coupled?Oscillator Arrays (pages 297–320): Chapter 10 Overall Conclusions and Possible Future Directions (pages 321–323): "This book presents the theory of phased array antennas that use arrays of electronic oscillators coupled to each other so as to mutually injection lock and thus oscillate as an ensemble. This arrangement provides a remarkably simple beam steering control system replacing the complicated array of computer controlled phase shifters traditionally used for this purpose. The book also describes a large number of laboratory demonstrations that have been reported over the past three decades that experimentally verify the various aspects of the theory. The theory is initially presented using a linear approximation permitting derivation of much of the array behavior analytically. Then, at a deeper level, a nonlinear formulation is used to obtain, computationally, more detailed aspects of the array behavior. The primary purpose of the book is to gather the salient results of the past ten to fifteen years of research in this area into one convenient volume providing both a tutorial explanation of this approach to phased array control and a guide to the literature on the subject"-- Provided by publisher