Electronically Scanned Arrays Esas And K Space Gain Formulation

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This book fills in details that are often left out of modern books on the theory of antennas. The starting point is a discussion of some general principles that apply to all electronic systems and to antennas in particular. Just as time domain functions can be expanded in terms of sine waves using Fourier transforms, spatial domain functions can be expanded in terms of plane waves also using Fourier transforms, and K-space gain is the spatial Fourier transform of the aperture weighting function. Other topics discussed include the Discrete Fourier Transform (DFT) formulation of antenna gain and what is missing in this formulation, the effect of sky temperature on the often specified G/T ratio of antennas, sidelobe control using conventional and novel techniques, and ESA digital beamforming versus adaptive processing to limit interference. Presents content the author derived when first asked to evaluate the performance of an electronically scanned array under design with manufacturing imperfections and design limitations; Enables readers to understand the firm theoretical foundation of antenna gain even when they must start from well-known formulations rather than first principles; Explains in a straightforward manner the relationship between antenna gain and aperture area; Discusses the relationship between sidelobe control algorithms and aperture shape, how to take advantage of it, and what the penalties are; Shows the equivalence of Minimum-Variance, Distortionless Response (MVDR) and Space-Time Adaptive Processing (STAP) and how these algorithms can be used with ESA subarrays to mitigate interference.

Product Details :

Genre : Technology & Engineering
Author : Roger A. Dana
Publisher : Springer
Release : 2019-02-14
File : 114 Pages
ISBN-13 : 9783030046781


Electronically Scanned Arrays Esas And K Space Gain Formulation

eBook Download

BOOK EXCERPT:

This book fills in details that are often left out of modern books on the theory of antennas. The starting point is a discussion of some general principles that apply to all electronic systems and to antennas in particular. Just as time domain functions can be expanded in terms of sine waves using Fourier transforms, spatial domain functions can be expanded in terms of plane waves also using Fourier transforms, and K-space gain is the spatial Fourier transform of the aperture weighting function. Other topics discussed include the Discrete Fourier Transform (DFT) formulation of antenna gain and what is missing in this formulation, the effect of sky temperature on the often specified G/T ratio of antennas, sidelobe control using conventional and novel techniques, and ESA digital beamforming versus adaptive processing to limit interference. Presents content the author derived when first asked to evaluate the performance of an electronically scanned array under design with manufacturing imperfections and design limitations; Enables readers to understand the firm theoretical foundation of antenna gain even when they must start from well-known formulations rather than first principles; Explains in a straightforward manner the relationship between antenna gain and aperture area; Discusses the relationship between sidelobe control algorithms and aperture shape, how to take advantage of it, and what the penalties are; Shows the equivalence of Minimum-Variance, Distortionless Response (MVDR) and Space-Time Adaptive Processing (STAP) and how these algorithms can be used with ESA subarrays to mitigate interference.

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Genre : TECHNOLOGY & ENGINEERING
Author : Roger A. Dana
Publisher :
Release : 2019
File : Pages
ISBN-13 : 3030046796


Electronically Scanned Arrays Matlab Modeling And Simulation

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"[Contains] more lengthy mathematical derivations than most {comparable books] ... for arrays, provides for a unique, stand-alone mathematical description that can be adopted by anyone trying to communicate the theoretical foundation for their array design...has insights from a practitioner that are unique. The MATLAB® scripts alone are worth the price." —Daniel C. Ross, Ph. D, Northrop Grumman Corporation Electronically Scanned Arrays: MATLAB® Modeling and Simulation is considered the first book to provide comprehensive modeling/simulation programs used to design and analyze Electronically Scanned Arrays (ESA), a key technology internationally in the scientific and engineering communities. Several books have been written about ESAs, but most cover only fundamental theory. Few, if any, provide the insightful, easy-to-use simulation tools found in this book. Obviously, MATLAB® is one of the greatest tools available for exploring and understanding science and engineering concepts, and we use MATLAB functions to easily and instantly calculate ESA patterns. However, to achieve a truly insightful and in-depth analysis of subarray architectures, conformal arrays, etc., it is imperative that users first develop a firm grasp of ESA fundamentals. Covers largely unexplored topics, such as reliability aspects and the application of ESAs in space This volume helps readers build that elemental understanding of how ESAs work. It also provides code to run as an aid, so that readers don’t have to start from scratch. The book expands on ESA principles and provides a modeling framework, using MATLAB to model applications of ESAs (i.e. pattern optimization, space-based applications, and reliability analysis). Presented code serves as an excellent vehicle to help readers master the analysis and simulation of ESAs. Exploring how difficult problems can be simplified with short, elegant solutions, this is an invaluable resource for students and others new to ESAs, as well as experienced practicing engineers who model ESAs at the systems level.

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Genre : Technology & Engineering
Author : Arik D. Brown
Publisher : CRC Press
Release : 2017-12-19
File : 228 Pages
ISBN-13 : 9781439861646


Scientific And Technical Aerospace Reports

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Genre : Aeronautics
Author :
Publisher :
Release : 1986
File : 1040 Pages
ISBN-13 : UIUC:30112075701539


Government Reports Announcements Index

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Genre : Science
Author :
Publisher :
Release : 1988
File : 1158 Pages
ISBN-13 : MINN:31951T00242674A


International Aerospace Abstracts

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Genre : Aeronautics
Author :
Publisher :
Release : 1997
File : 662 Pages
ISBN-13 : STANFORD:36105021091405


Jane S Space Directory

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Genre : Astronautics
Author :
Publisher :
Release : 1999
File : 670 Pages
ISBN-13 : UOM:39015048130200


Japanese Science And Technology

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Genre : Science
Author :
Publisher :
Release : 1988
File : 760 Pages
ISBN-13 : CORNELL:31924057828513


Physics Briefs

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Genre : Physics
Author :
Publisher :
Release : 1990
File : 1378 Pages
ISBN-13 : STANFORD:36105005190132


Science Citation Index

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Vols. for 1964- have guides and journal lists.

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Genre : Science
Author :
Publisher :
Release : 1993
File : 2300 Pages
ISBN-13 : PSU:000056938401