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Author : Jonas Gamalielsson
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (856 download)
Download or read book Applicability of a Genetic Algorithm when Optimizing a Planar Inverted F Antenna written by Jonas Gamalielsson and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrea M. Wyant
Publisher :
ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.:/5 (172 download)
Download or read book Genetic Algorithm Optimization Applied to Planar and Wire Antennas written by Andrea M. Wyant and published by . This book was released on 2007 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Antenna design has grown more stringent and difficult over the years as the world becomes strictly a wireless environment. The inherent tradeoffs that exist between gain, radiation pattern, bandwidth, and physical size and the multiple parameters that must be considered make antenna design a lengthy and tedious process. Methods have been devised which automate this complex process of antenna optimization through the use of genetic algorithms, particle swarm optimization, and simulated annealing. Genetic algorithms are capable of handling a large number of design parameters and work for optimization problems that have discontinuous or non-differentiable multi-dimensional solution spaces, making them ideal for antenna optimization. In the present work, a genetic algorithm has been used for size reduction in microstrip patch antennas and design tradeoff optimization between beamwidth and gain in helical antennas. A method for reducing the size of microstrip patch antennas by up to 75% by removing rectangular and circular slots from the metal of the microstrip patch is presented. A solid patch antenna that resonates at 10 GHz is forced to resonant at 6 GHz through the removal of the different shaped slots. Given the number and shape of the slots, the genetic algorithm is used to optimize the size and location of the slot on the patch. The designs are obtained by interfacing the genetic algorithm and Ansoft High Frequency System Simulator (HFSS) and validated through design, construction, and testing. High gain, with broad half-power beamwidths (HPBW) is traditionally extremely difficult to achieve due to the inherent tradeoff between the two. A genetic algorithm has been applied to design a helical antenna with a gain of 10 dB and HPBWs of 60 degrees. In order to achieve this, three physical parameters of the helix have been changed, namely the pitch, helix radius, and the ground plane geometry. The second objective is to create an antenna that displays different HPBWs in the two radiation planes. This could be extremely useful in many communication environments and there is yet no existing method to achieve this. The genetic algorithm produced a helical antenna that shows a 19 degrees difference in HPBW between the two radiation planes, while still displaying a 7 dB gain and low side lobes. Numerical Electromagnetic Code 4 (NEC4) is used, and a method of communication between MATLAB and NEC4 has been developed to make the genetic algorithm optimization possible"--Abstract.
Author : Derek Scott Linden
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.3/5 (243 download)
Download or read book Automated Design and Optimization of Wire Antennas Using Genetic Algorithms written by Derek Scott Linden and published by . This book was released on 1997 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Genetic Algorithm (GA) has been used in conjunction with the Numerical Electromagnetics Code, Version 2 (NEC2) to create and optimize atypical wire antenna designs with impressive characteristics. Antenna design parameters are encoded into an ordered series of numbers and/or symbols analogous to a biological chromosome. A cost function that quantifies how well a design meets the engineer's specifications is created. The GA uses these to generate and evaluate a population of designs. The most successful designs are then promoted and mixed through mating and mutation, while poor designs are removed. This process, difficult to trap in local minima, continues until convergence criteria are met, generally yielding excellent designs with no user intervention or initial guesses. Three antennas have been optimized: a monopole loaded with a modified folded dipole, the Yagi antenna, and the crooked-wire genetic antenna. Prior study of the loaded monopole had shown hemispherical coverage was possible. The GA found an asymmetric loaded monopole with an average variation in gain over the hemisphere of only 0.4dB, confirmed by measurement. GA-optimized Yagi antennas surpassed the gain of conventional Yagis by about 1dB, improvement also confirmed by measurement. The GA designed a Yagi with a beamwidth of 50 deg -60 deg, sidelobes nearly 25dB down, and a 14% bandwidth-specifications difficult to achieve using conventional techniques. The crooked-wire genetic antenna is several wires joined in series; locations and lengths are determined by the GA. Optimization for hemispherical coverage with right-hand circular polarization (RHCP) produced highly unusual shapes unrealizable using a conventional approach. RHCP hemispherical coverage was achieved with less than 4dB variation. Measurements verify the results.
Author : Omar Aqeel Saraereh
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book The Design of Multi-Band Planar Inverted-F Antennas for Mobile Handsets with the Aid of a Novel Genetic Algorithm and Their Specific Absorption Rate written by Omar Aqeel Saraereh and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless Communications have progressed very rapidly in recent years and mobile handsets are becoming smaller and smaller. Present-day mobile cellular communication systems include combinations of the AMPS, GSM-900, DCS-I800, PCS-I900, UMTS, and WLANs in the 2.4GHz and 5.2GHz bands. User requirements for access to the various aforementioned wireless telecommunication services have resulted in a rapid technological push to unify these different systems in a drastically decreased size single mobile handset. All this combined with strict limitations set for the energy absorbed by the users of mobile terminals has created a need for improved antenna solutions and better understanding of small antennas. The objective of this thesis is to develop novel multi-band handset antenna design solutions to satisfy the specific bandwidth requirements of mobile cellular communication systems. Devices having internal antennas have appeared to fill this need. In the past few years, new designs based on the planar inverted-F handset antenna (PIFA) have been used for handheld wireless devices because theses types of antennas have low-profile geometry and can be embedded into mobile handsets. Therefore, the antenna topology proposed and researched to achieve the target of this thesis is the PIFA. The research involves the design of a genetic algorithm (GA) optimisation applicable to PIFAs. The technique is used to optimise the PIFA to produce a dual-band PIFA handset design suitable for personal communications at GSM-900/DCS-I800. Strategically extending and shaping the conductive plate of the optimised dual-band PIFA, a triple-band PIFA covering the DCS-I800/PCS-I900/UMTS bands is produced. The triple-band PIFA is extended to a quad-band design, by combining a meander-line planar monopole with the antenna structure to accommodate the GSM-900 band. The thesis also examines a penta-band PIFA handset design that is a potential candidate for small and low-profile structures to cover the AMPS/GSM-900/DCS-I800/PCS-I900/UMTS bands. Finally, a simulation and experimental study has been carried out to examine the relationship between the specific absorption rate (SAR) and the separation distance between a PIFA and a phantom head. The study also examines the relationship between the SAR and the antenna efficiency.
Author : Wego Wang
Publisher : Springer Science & Business Media
ISBN 13 : 3319012738
Total Pages : 1041 pages
Book Rating : 4.3/5 (19 download)
Download or read book Mechatronics and Automatic Control Systems written by Wego Wang and published by Springer Science & Business Media. This book was released on 2013-11-18 with total page 1041 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines mechatronics and automatic control systems. The book covers important emerging topics in signal processing, control theory, sensors, mechanic manufacturing systems and automation. The book presents papers from the 2013 International Conference on Mechatronics and Automatic Control Systems in Hangzhou, held in China during August 10-11, 2013.
Author :
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.:/5 (924 download)
Download or read book Optimization of Electrical Parameters for a Planar Inverted-F Antenna (PIFA) Using an EM-simulation Program written by and published by . This book was released on 2000 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vasant, Pandian
Publisher : IGI Global
ISBN 13 : 1466696451
Total Pages : 999 pages
Book Rating : 4.4/5 (666 download)
Download or read book Handbook of Research on Modern Optimization Algorithms and Applications in Engineering and Economics written by Vasant, Pandian and published by IGI Global. This book was released on 2016-03-08 with total page 999 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern optimization approaches have attracted many research scientists, decision makers and practicing researchers in recent years as powerful intelligent computational techniques for solving several complex real-world problems. The Handbook of Research on Modern Optimization Algorithms and Applications in Engineering and Economics highlights the latest research innovations and applications of algorithms designed for optimization applications within the fields of engineering, IT, and economics. Focusing on a variety of methods and systems as well as practical examples, this book is a significant resource for graduate-level students, decision makers, and researchers in both public and private sectors who are seeking research-based methods for modeling uncertain real-world problems. .
Author : Luis R.J. Costa
Publisher : Springer Science & Business Media
ISBN 13 : 3642122949
Total Pages : 610 pages
Book Rating : 4.6/5 (421 download)
Download or read book Scientific Computing in Electrical Engineering SCEE 2008 written by Luis R.J. Costa and published by Springer Science & Business Media. This book was released on 2010-06-14 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of 65 selected papers presented at the 7th International Conference on Scientific Computing in Electrical Engineering (SCEE), held in Espoo, Finland, in 2008. The aim of the SCEE 2008 conference was to bring together scientists from academia and industry, e.g. mathematicians, electrical engineers, computer scientists, and physicists, with the goal of intensive discussions on industrially relevant mathematical problems, with an emphasis on modeling and numerical simulation of electronic circuits and devices, electromagnetic fields, and coupled problems.This extensive reference work is divided into five parts: 1. Computational electromagnetics, 2. Circuit simulation, 3. Coupled problems, 4. Mathematical and computational methods, and 5. Model-order reduction. Each part starts with an general introduction followed by the actual papers.
Author :
Publisher : ScholarlyEditions
ISBN 13 : 1464963916
Total Pages : 1976 pages
Book Rating : 4.4/5 (649 download)
Download or read book Issues in Electronics Research and Application: 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 1976 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Electronics Research and Application: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Electronics Research and Application. The editors have built Issues in Electronics Research and Application: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Electronics Research and Application in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Electronics Research and Application: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Author : Edward E. Altshuler
Publisher :
ISBN 13 : 9781423521952
Total Pages : 91 pages
Book Rating : 4.5/5 (219 download)
Download or read book Military Antenna Design Using Simple and Competent Genetic Algorithms written by Edward E. Altshuler and published by . This book was released on 2004-06-01 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, the Air Force Research Laboratory (AFRL) antenna Technology Branch at Hanscom AFB has employed the simple genetic algorithm (SGA) as an optimization tool for a wide variety of antenna applications. Over roughly the same period, researchers at the Illinois Genetic Algorithm Laboratory (IlliGAL) at the University of Illinois at Urbana-Champaign have developed GA design theory and advanced GA techniques called competent genetic algorithms that solve hard problems quickly, reliably, and accurately. Recently, under the guidance and direction of the Air Force Office of Scientific Research (AFOSR), the two laboratories have formed a collaboration, the common goal of which is to apply simple, competent, and hybrid GA techniques to challenging antenna problems. This paper is composed of two parts. The first part of this paper summarizes previous research conducted by AFRL at Hanscom for which SGAs were implemented to obtain acceptable solutions to several antenna problems. The second part of this paper starts by briefly reviewing the design theory and design principles necessary for the invention and implementation of fast, scalable genetic algorithms. A particular procedure, the hierarchical Bayesian optimization algorithm (hBOA) is then briefly outlined, and the remainder of the paper describes collaborative efforts of AFRL and IlliGAL to solve more difficult antenna problems.
Author : Rajagopal Sivakumar
Publisher : Trans Tech Publications Ltd
ISBN 13 : 3038139440
Total Pages : 2010 pages
Book Rating : 4.0/5 (381 download)
Download or read book Manufacturing Science and Technology III written by Rajagopal Sivakumar and published by Trans Tech Publications Ltd. This book was released on 2012-12-27 with total page 2010 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collection includes selected, peer-reviewed papers from the 2012 3rd International Conference on Manufacturing Science and Technology (ICMST 2012) held August 18-19, 2012 in New Delhi, India. The 377 peer reviewed papers are grouped into the following chapters: Chapter 1: Optimization and ?omputational Techniques in Materials and Manufacturing, Chapter 2: Development of Novel Materials and their Characterization, Chapter 3: Advances in Welding Technology, Chapter 4: Advances in Tool-Chip Technology, Machining and Surface Roughness, Chapter 5: Advances in Various Manufacturing Processes and Technology, Chapter 6: Product and Material Development, Design and Processing, Chapter 7: Analysis, Modelling and Simulation Techniques in Manufacturing Processes, Chapter 8: Materials Science and Technology, Chapter 9: Nanotechnology and Nanocomposites in Manufacturing, Chapter 10: Energy, Green Materials and Technologies, Engines, Wind and Hybrid Power Systems, Chapter 11: Manufacturing and Processing of Reinforced and Metal Matrix Composites, Chapter 12: Inspection and Control Systems, Testing, Instrumentation and Measurement, Chapter 13: Materials Thermal Effects and Thermal Systems in Manufacturing, Chapter 14: Researches in Environmental, Geology Science and Sustainable Systems, Chapter 15: Advances in Research of Biotechnology, Chapter 16: Miscellaneous Topics.
Author : Brian John Herting
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (547 download)
Download or read book Design and Optimization of a Dual Band Two Slot Planar Inverted F Antenna written by Brian John Herting and published by . This book was released on 2003 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohammad Abdul Matin
Publisher : Springer Nature
ISBN 13 : 303074311X
Total Pages : 448 pages
Book Rating : 4.0/5 (37 download)
Download or read book Wideband, Multiband, and Smart Antenna Systems written by Mohammad Abdul Matin and published by Springer Nature. This book was released on 2021-09-21 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides current R&D trends and novel approaches in design and analysis of broadband, multiband, and smart antennas for 5G and B5G mobile and wireless applications, as well as the identification of integration techniques of these antennas in a diverse range of devices. The book presents theoretical and experimental approaches to help the reader in understanding the unique design issues and more advanced research. Moreover, the book includes chapters on the fundamentals of antenna theory. The book is pertinent to professionals and researchers working in the field of antenna engineering; it is written for graduate students, researchers, academics, and industry practitioners who want to improve their understanding in the current research trends in design analysis of broadband, multiband, and smart antennas for wireless applications.
Author : Balamati Choudhury
Publisher : Springer
ISBN 13 : 9811038368
Total Pages : 192 pages
Book Rating : 4.8/5 (11 download)
Download or read book Metamaterial Inspired Electromagnetic Applications written by Balamati Choudhury and published by Springer. This book was released on 2017-05-04 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the role of soft-computing-based electromagnetic computational engines in design and optimization of a wide range of electromagnetic applications. In addition to the theoretical background of metamaterials and soft-computing techniques, the book discusses novel electromagnetic applications such as tensor analysis for invisibility cloaking, metamaterial structures for cloaking applications, broadband radar absorbers, and antennas. The book will prove to be a valuable resource for academics and professionals, as well as military researchers working in the area of metamaterials.
Author : Mahalingam Sundhararajan
Publisher : European Alliance for Innovation
ISBN 13 : 1631903063
Total Pages : 1318 pages
Book Rating : 4.6/5 (319 download)
Download or read book I3CAC 2021 written by Mahalingam Sundhararajan and published by European Alliance for Innovation. This book was released on 2021-06-04 with total page 1318 pages. Available in PDF, EPUB and Kindle. Book excerpt: I3CAC provides a premier interdisciplinary platform for researchers, practitioners and educators to present and discuss not only the most recent innovations, trends, and concerns but also practical challenges encountered and solutions adopted in the fields of computing, communication and control systems. Participation of three renowned speakers and oral presentations of the 128 authors were presented in our conference. We strongly believe that the I3CAC 2021 conference provides a good forum for all researchers, developers and practitioners to discuss.
Author : Adam Slowik
Publisher : CRC Press
ISBN 13 : 1000168727
Total Pages : 379 pages
Book Rating : 4.0/5 (1 download)
Download or read book Swarm Intelligence Algorithms (Two Volume Set) written by Adam Slowik and published by CRC Press. This book was released on 2021-01-26 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Swarm intelligence algorithms are a form of nature-based optimization algorithms. Their main inspiration is the cooperative behavior of animals within specific communities. This can be described as simple behaviors of individuals along with the mechanisms for sharing knowledge between them, resulting in the complex behavior of the entire community. Examples of such behavior can be found in ant colonies, bee swarms, schools of fish or bird flocks. Swarm intelligence algorithms are used to solve difficult optimization problems for which there are no exact solving methods or the use of such methods is impossible, e.g. due to unacceptable computational time. This set comprises two volumes: Swarm Intelligence Algorithms: A Tutorial and Swarm Intelligence Algorithms: Modifications and Applications. The first volume thoroughly presents the basics of 24 algorithms selected from the entire family of swarm intelligence algorithms. It contains a detailed explanation of how each algorithm works, along with relevant program codes in Matlab and the C ++ programming language, as well as numerical examples illustrating step-by-step how individual algorithms work. The second volume describes selected modifications of these algorithms and presents their practical applications. This book presents 24 swarm algorithms together with their modifications and practical applications. Each chapter is devoted to one algorithm. It contains a short description along with a pseudo-code showing the various stages of its operation. In addition, each chapter contains a description of selected modifications of the algorithm and shows how it can be used to solve a selected practical problem.
Author :
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.:/5 (132 download)
Download or read book Military Antenna Design Using Simple and Competent Genetic Algorithms written by and published by . This book was released on 2005 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
