Array Pattern Optimization

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Array Pattern Optimization

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Author : Jafar Ramadhan Mohammed
language : en
Publisher: BoD – Books on Demand
Release Date : 2019-03-27

Array Pattern Optimization written by Jafar Ramadhan Mohammed and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-03-27 with Technology & Engineering categories.

Array pattern optimization is a very important and necessary issue in the majority of modern communication systems in a variety of applications such as sonar, radar, navigation, wireless communications, and many other engineering fields. Classical methods for array pattern synthesis have worked mainly with analytical models that are linear, local and, thus, their performances were not optimum. They have always been designed with closed-form mathematical models. Unlike these analytical methods, the global optimization methods with powerful computing tools offer optimum solutions. During the last few years, the design of the antenna arrays has been a topic of significant research activity. This book presents recent advances in the field of array pattern optimization. It is targeted primarily toward students and researchers who want to be exposed to a wide variety of antenna array design and optimization. It includes five chapters as well as the introductory chapter. These five chapters are categorized into five different areas depending on the application. These applications are ordered to address interference suppression, electronic toll collection, mmWave and ultra-wideband, integrated antennas, and educational packages for modeling smart antenna for 5G wireless communications. The book has the advantage of providing a collection of applications that are entirely independent and self-contained; thus, the interested reader can choose any chapter and skip to another without losing continuity.

Array Pattern Optimization

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Author : Khalil Hassan Sayidmarie
language : en
Publisher:
Release Date : 2019

Array Pattern Optimization written by Khalil Hassan Sayidmarie and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Information technology categories.

Array pattern optimization is a very important and necessary issue in the majority of modern communication systems in a variety of applications such as sonar, radar, navigation, wireless communications, and many other engineering fields. Classical methods for array pattern synthesis have worked mainly with analytical models that are linear, local and, thus, their performances were not optimum. They have always been designed with closed-form mathematical models. Unlike these analytical methods, the global optimization methods with powerful computing tools offer optimum solutions. During the last few years, the design of the antenna arrays has been a topic of significant research activity. This book presents recent advances in the field of array pattern optimization. It is targeted primarily toward students and researchers who want to be exposed to a wide variety of antenna array design and optimization. It includes five chapters as well as the introductory chapter. These five chapters are categorized into five different areas depending on the application. These applications are ordered to address interference suppression, electronic toll collection, mmWave and ultra-wideband, integrated antennas, and educational packages for modeling smart antenna for 5G wireless communications. The book has the advantage of providing a collection of applications that are entirely independent and self-contained; thus, the interested reader can choose any chapter and skip to another without losing continuity.

Advances In Array Optimization

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Author : Ertugrul Aksoy
language : en
Publisher: BoD – Books on Demand
Release Date : 2020-03-04

Advances In Array Optimization written by Ertugrul Aksoy and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-04 with Technology & Engineering categories.

The need to develop technology and communication necessitates the design of flexible and high-capacity radiating systems in today's communication infrastructure. In this context, antenna arrays are the ideal solution and have been one of the priority research subjects of the science community dealing with electromagnetics from past to present. Optimization of an array may be performed in various ways such as the optimization of excitation, reflector structure, feed network, etc. depending on the array structure. This book is a collection of seven research studies focused on the optimization of array structures in classical phased array or time modulation, including radiator, reflector, feed network, and radiating element optimizations.

Phased Array Antenna Pattern Optimization With Failed Elements

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Author : B. F Collins (II.)
language : en
Publisher:
Release Date : 1987

Phased Array Antenna Pattern Optimization With Failed Elements written by B. F Collins (II.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.

This paper discusses several methods of optimizing the pattern of a phased array antenna. Two methods, the gradient search algorithm method and the null displacement technique were shown to be applicable to optimizing a phased array with failed elements. The results of the study show how the pattern can be optimized depending on the scalar cost function and constraints chosen and what effects varying the complex weight of the array elements has on the pattern.

Optimization Of The Antenna Pattern Of A Phased Array With Failed Elements

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Author :
language : en
Publisher:
Release Date : 1986

Optimization Of The Antenna Pattern Of A Phased Array With Failed Elements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

Using a phased array antenna on a system can add dimensions of flexibility and control. By varying the phase and amplitude of the current exciting each element, the far field antenna pattern can be modified in such a way as to obtain a desired, optimal pattern. The purpose of this thesis is to develop a rapid compensation method for any element failures by varying the currents exciting the remaining elements. Although many methods for optimizing the pattern of a full array are available, this work is unique because it develops methods of finding the optimum pattern of an array which contains failed or missing elements. Optimization methods in the literature which were investigated include thinned array analysis, adaptive array analysis, eigenvalue methods, null displacement techniques, and assorted iterative techniques. Another method discussed in this thesis, the direct technique, originated from the need for a quick optimization method, especially when very large arrays are used. (Thesis).

Optimization Of Antenna Pattern From A Linear Array

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Author :
language : en
Publisher:
Release Date : 1997

Optimization Of Antenna Pattern From A Linear Array written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.

Simulation Based Optimization Of Antenna Arrays

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Author : Slawomir Koziel
language : en
Publisher: World Scientific
Release Date : 2019-02-13

Simulation Based Optimization Of Antenna Arrays written by Slawomir Koziel and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-13 with Technology & Engineering categories.

The book addresses surrogate-assisted design of antenna arrays, in particular, how surrogate models, both data-driven and physics-based, can be utilized to expedite procedures such as parametric optimization, design closure, statistical analysis, or fault detection. Algorithms and design frameworks are illustrated using a large variety of examples including real-world printed-circuit antenna and antenna array structures.This unique compendium contains introductory materials concerning numerical optimization, both conventional (gradient-based and derivative-free, including metaheuristics) and surrogate-based, as well as a considerable selection of customized procedures developed specifically to handle antenna array problems. Recommendations concerning practical aspects of surrogate-assisted multi-objective antenna optimization are also given. The methods presented allow for cost-efficient handling of antenna array design problems (involving CPU-intensive EM models) in the context of design optimization and statistical analysis, which will benefit both researchers, designers and graduate students.

Optimization Of The Antenna Pattern Of A Phased Array With Faled Elements

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Author : Bernard F. Collins (CAPT, USAF., II)
language : en
Publisher:
Release Date : 1986

Optimization Of The Antenna Pattern Of A Phased Array With Faled Elements written by Bernard F. Collins (CAPT, USAF., II) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Antenna arrays categories.

Antenna Arrays Performance Limits And Geometry Optimization

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Author : consultant expert mohamed taha
language : en
Publisher:
Release Date : 2021-02-02

Antenna Arrays Performance Limits And Geometry Optimization written by consultant expert mohamed taha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-02-02 with categories.

ABSTRACTThe radiation pattern of an antenna array depends strongly on the weighting methodand the geometry of the array. Selection of the weights has received extensive attention,primarily because the radiation pattern is a linear function of the weights. However, thearray geometry has received relatively little attention even though it also stronglyinfluences the radiation pattern. The reason for this is primarily due to the complex wayin which the geometry affects the radiation pattern. The main goal of this dissertation isto determine methods of optimizing array geometries in antenna arrays.An adaptive array with the goal of suppressing interference is investigated. It isshown that the interference rejection capabilities of the antenna array depend upon itsgeometry. The concept of an interference environment is introduced, which enablesoptimization of an adaptive array based on the expected directions and power of theinterference. This enables the optimization to perform superior on average, instead of forspecific situations. An optimization problem is derived whose solution yields an optimalarray for suppressing interference. Optimal planar arrays are presented for varyingnumber of elements. It is shown that, on average, the optimal arrays increase the signalto-interference-plus-noise ratio (SINR) when compared to standard arrays.Sidelobe level is an important metric used in antenna arrays, and depends on theweights and positions in the array. A method of determining optimal sidelobeminimizing weights is derived that holds for any linear array geometry, beamwidth,antenna type and scan angle. The positions are then optimized simultaneously with theoptimal weights to determine the minimum possible sidelobe level in linear arrays. Results are presented for arrays of varying size, with different antenna elements, and fordistinct beamwidths and scan angles.Minimizing sidelobes is then considered for 2D arrays. A method of determiningoptimal weights in symmetric 2D arrays is derived for narrowband and wideband cases.The positions are again simultaneously optimized with the weights to determine optimalarrays, weights and sidelobe levels. This is done for arrays with varying number ofelements, beamwidths, bandwidths, and different antenna elements.

Convex Optimization And Array Orientation Diversity Based Sparse Array Beampattern Synthesis

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Author : Hui Chen
language : en
Publisher:
Release Date : 2022

Convex Optimization And Array Orientation Diversity Based Sparse Array Beampattern Synthesis written by Hui Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Electronic books categories.

The sparse array pattern synthesis (APS) has many important implications in some special situations where the weights, size, and cost of antennas are limited. In this chapter, the APS with a minimum number of elements problem is investigated from the perspective of sparseness constrained optimization. Firstly, to reduce the number of antenna elements in the array, the APS problem is formulated as sparseness constrained optimization problem under compressive sensing (CS) framework and solved by using the reweighted L1-norm minimization algorithm. Besides, to address left-right radiation pattern ambiguity problem, the proposed algorithm exploits the array orientation diversity in the sparsity constraint framework. Simulation results demonstrate the proposed method,Äôs validity of achieving the desired radiation beampattern with the minimum number of antenna elements.