Active Cancellation Of Probing In Linear Dipole Phased Array
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Active Cancellation of Probing in Linear Dipole Phased Array
In this book, a modified improved LMS algorithm is employed for weight adaptation of dipole array for the generation of beam pattern in multiple signal environments. In phased arrays, the generation of adapted pattern according to the signal scenario requires an efficient adaptive algorithm. The antenna array is expected to maintain sufficient gain towards each of the desired source while at the same time suppress the probing sources. This cancels the signal transmission towards each of the hostile probing sources leading to active cancellation. In the book, the performance of dipole phased array is demonstrated in terms of fast convergence, output noise power and output signal-to-interference-and noise ratio. The mutual coupling effect and role of edge elements are taken into account. It is established that dipole array along with an efficient algorithm is able to maintain multilobe beamforming with accurate and deep nulls towards each probing source. This work has application to the active radar cross section (RCS) reduction. This book consists of formulation, algorithm description and result discussion on active cancellation of hostile probing sources in phased antenna array. It includes numerous illustrations demonstrating the theme of the book for different signal environments and array configurations. The concepts in this book are discussed in an easy-to-understand manner, making it suitable even for the beginners in the field of phased arrays and adaptive array processing.
Active Radar Cross Section Reduction
Author: Hema Singh
language: en
Publisher: Cambridge University Press
Release Date: 2015-03-02
This book discusses the active and passive radar cross section (RCS) estimation and techniques to examine the low observable aerospace platforms. It begins with the fundamentals of RCS, followed by the dielectric, magnetic and metamaterials parameters of the constituent materials and then explains various methods and the emerging trends followed in this area of study. The RCS estimation of phased array including the mutual coupling effect is also presented in detail in the book. The active RCS reduction is carefully touched upon through the performance of phased arrays, sidelobe cancellers and mitigation of multipath effect. Providing information on various adaptive algorithms like least mean square (LMS), recursive least square (RLS) and weighted least square algorithms, the authors also mention the recent developments in the area of embedded antennas, conformal load bearing antenna, metamaterials and frequency selective surface (FSS) based RCS reduction.
Introduction to Active Phased Arrays
Written by a renowned expert in the field, this book presents the fundamentals of phased array systems, including contemporary and advanced methods. It features applications ranging from advanced and commercial radars to remote sensing, and multiple channel communications. You will find detailed coverage of fields and waves analysis, domain analysis, fundamentals of array theory, far field synthesis, Floquet theory, aperture weighting functions, impedance and mutual coupling theory, and many other technical applications in system design. The book helps you understand array fundamentals that can be realized by analog, digital or hybrid beamforming methods, reflecting perceived trends in the industry. You’ll also benefit from numerous practice cases, with examples and illustrations to sharpen your understanding. The book leads readers through practical observations, analysis, and design methods that equip both entry-level and experienced engineers with the basic information to solve today’s problems and be in position to take on next-generation engineering and scientific challenges.