A comprehensive tutorial on the design and practical applications of antenna arrays An antenna array is an assembly of antenna elements that maximizes a received or transmitted signal in a desired direction. This practical book covers a wide range of antenna array topics that are becoming increasingly important in wireless applications, with emphasis on array design, applications, and computer modeling. Each chapter in Antenna Arrays builds upon the previous chapter, progressively addressing more difficult material. Beginning with basic electromagnetics/antennas/antenna systems information, the book then deals with the analysis and synthesis of arrays of point sources and their associated array factors. It presents a sampling of different antenna elements that replace these point sources, then presents element configurations that do not have to lie along a line or in a plane. The complex and difficult-to-predict interactions of elements and electromagnetic waves are introduced, along with computer modeling and experiments that are necessary for predicting the performance of arrays where mutual coupling is important. Then, various approaches to getting signals to and from the array elements to a computer where the signal detection takes place are explored, as are the numerical techniques behind smart antennas. The book emphasizes the computational methods used in the design and analysis of array antennas. Also featured are signal processing and numerical modeling algorithms, as well as pictures of antenna arrays and components provided by industry and government sources, with explanations of how they operate. Fully course-tested, Antenna Arrays serves as a complete text in phased array design and theory for advanced undergraduate- and graduate-level courses in electronics and communications, as well as a reference for practicing engineers and scientists in wireless communications, radar, and remote sensing.
Introduces timed arrays and design approaches to meet the new high performance standards The author concentrates on any aspect of an antenna array that must be viewed from a time perspective. The first chapters briefly introduce antenna arrays and explain the difference between phased and timed arrays. Since timed arrays are designed for realistic time-varying signals and scenarios, the book also reviews wideband signals, baseband and passband RF signals, polarization and signal bandwidth. Other topics covered include time domain, mutual coupling, wideband elements, and dispersion. The author also presents a number of analog and digital beamforming networks for creating and manipulating beams. The book concludes with an overview of the methods to integrate time delay into the array design and of several other adaptive arrays that prove useful in many different systems. Examines RF signal concepts such as polarization and signal bandwidth and their applications to timed antenna arrays Covers arrays of point source, elements in timed antenna arrays, active electronically scanned array technology, and time delay in corporate fed arrays Includes complete design examples for placing time delay in arrays Timed Arrays: Wideband and Time Varying Antenna Arrays is written for practicing engineers and scientists in wireless communication, radar, and remote sensing as well as graduate students and professors interested in advanced antenna topics.
Life's a Fish and Then You Fry" takes a romp through the culinary curiosities of coastal Alaska. With snappy cooking tips from Randy Bayliss, and the weird and wonderful art of Ray Troll, this is not your mother's cookbook.
Psychology is of interest to academics from many fields, as well as to the thousands of academic and clinical psychologists and general public who can't help but be interested in learning more about why humans think and behave as they do. This award-winning twelve-volume reference covers every aspect of the ever-fascinating discipline of psychology and represents the most current knowledge in the field. This ten-year revision now covers discoveries based in neuroscience, clinical psychology's new interest in evidence-based practice and mindfulness, and new findings in social, developmental, and forensic psychology.
Use discount Code FEBRUARY15 for 15% off at checkout! Hurry, expires midnight Friday 24 February. Buckingham County suffered significant loss of its early court records. This scarcity of records makes this tax list transcription a valuable one. Spanning a period of 29 years (1764,1773-4,1782-92) with over 12,700 individual records, statistical tables and graphs, plus a host of other information that will illuminate the lives and social structure of the county during the late Colonial and early Federal period. Information varies by year, but the curious researcher will find much of interest here. Included are the names of the taxpayers, their taxable male cohabitants, their slaves' names, number of their slaves, horses and cattle along with other taxable items like riding carriages and acres of land. Features a 160 page index of every name, allowing the researcher to quickly assemble the information needed in successive years for genealogical, historical, sociological or demographic analysis.
A comprehensive introduction to the fundamentals of design and applications of wireless communications Wireless Communications Systems starts by explaining the fundamentals needed to understand, design, and deploy wireless communications systems. The author, a noted expert on the topic, explores the basic concepts of signals, modulation, antennas, and propagation with a MATLAB emphasis. The book emphasizes practical applications and concepts needed by wireless engineers. The author introduces applications of wireless communications and includes information on satellite communications, radio frequency identification, and offers an overview with practical insights into the topic of multiple input multiple output (MIMO). The book also explains the security and health effects of wireless systems concerns on users and designers. Designed as a practical resource, the text contains a range of examples and pictures that illustrate many different aspects of wireless technology. The book relies on MATLAB for most of the computations and graphics. This important text: Reviews the basic information needed to understand and design wireless communications systems Covers topics such as MIMO systems, adaptive antennas, direction finding, wireless security, internet of things (IoT), radio frequency identification (RFID), and software defined radio (SDR) Provides examples with a MATLAB emphasis to aid comprehension Includes an online solutions manual and video lectures on selected topics Written for students of engineering and physics and practicing engineers and scientists, Wireless Communications Systems covers the fundamentals of wireless engineering in a clear and concise manner and contains many illustrative examples.
A thorough and insightful introduction to using genetic algorithms to optimize electromagnetic systems Genetic Algorithms in Electromagnetics focuses on optimizing the objective function when a computer algorithm, analytical model, or experimental result describes the performance of an electromagnetic system. It offers expert guidance to optimizing electromagnetic systems using genetic algorithms (GA), which have proven to be tenacious in finding optimal results where traditional techniques fail. Genetic Algorithms in Electromagnetics begins with an introduction to optimization and several commonly used numerical optimization routines, and goes on to feature: Introductions to GA in both binary and continuous variable forms, complete with examples of MATLAB(r) commands Two step-by-step examples of optimizing antenna arrays as well as a comprehensive overview of applications of GA to antenna array design problems Coverage of GA as an adaptive algorithm, including adaptive and smart arrays as well as adaptive reflectors and crossed dipoles Explanations of the optimization of several different wire antennas, starting with the famous "crooked monopole" How to optimize horn, reflector, and microstrip patch antennas, which require significantly more computing power than wire antennas Coverage of GA optimization of scattering, including scattering from frequency selective surfaces and electromagnetic band gap materials Ideas on operator and parameter selection for a GA Detailed explanations of particle swarm optimization and multiple objective optimization An appendix of MATLAB code for experimentation
Contracts: Cases and Doctrine features a mix of lightly-edited classic and contemporary cases that stress current contract doctrine along with the essential lawyering skill of case analysis—how to sift through the facts of the case to discern the prevailing rules and theory. Randy Barnett and Nate Oman’s innovative text introduces each case and provides the historical background of the iconic cases that make the study of contract law engaging. Study Guide questions help students identify salient issues as they read each case. Judicial biographies of each judge provide additional context. The 8th Edition has been streamlined and edited to delete materials that are rarely covered in a 1L class. This edition includes new cases that have been chosen for their topicality, facts, or pedagogical usefulness. Areas covered include so-called “smart contracts” and the relationship between restitution and contract. As always, the authors focus on cases with facts that will be easier to teach. New cases in this edition include litigation between Ukraine and Russia over Russia’s invasion of its neighbor, a plea bargaining deal gone wrong, what happens when an employee signs a boilerplate arbitration contract “No Rejected,” and a dispute over whether spiders are insects. New to the 8th Edition: In order to keep the size of the book manageable, the authors have simplified its structure by condensing some of the more theoretical material on enforceability. The chapters on Principles of Enforceability and Intention to be Legally Bound have been deleted entirely, and highly truncated portions of the materials from these chapters have been added to the chapters on The Doctrine of Consideration and The Doctrine of Promissory Estoppel. New cases include: • In re IBP Inc. Shareholders Litigation (specific performance of a merger agreement involving personal services) • Bjorkman v. Arctic Cat, Inc. (modern application of the rule in Dickinson v. Dodds) • Ragland v. IEC US Holdings, Inc. (a new employee signed a boilerplate arbitration contract “No Rejected”) • Rios v. State of Maryland (confused bargaining over a plea bargaining agreement) • Robinson v. Liberty Mutual Insurance Co. (What is a spider? An example of neo-textualist interpretation) • Law Debenture Trust Corp. Plc. v. Ukraine (litigation between two countries – Russia and Ukraine – in the courts of a third country, England) • Martinez-Gonzalez v. Elkhorn Packing Co. LLC (duress in an employment contract involving a migrant worker) Professors and student will benefit from: • Case-based approach gives students ample doctrinal materials to sift through for facts and analyze for prevailing rules and theory. • Cases are lightly edited, or presented as whole as possible, to give first-year students the opportunity to develop case-analysis skills. • Restatement and UCC sections are integrated to encourage students to consult them as they read the cases. • Iconic and contemporary cases are combined to show how the classic cases are still relevant. • Each chapter begins with a brief, accessible textual introduction. • Study Guide questions before each case help focus student attention on salient issues. • Flexible organization begins with Remedies, but chapters can be taught in any order.
This latest volume addresses the contemporary issues related to recombination in filamentous fungi, EST data mining, fungal intervening sequences, gene silencing, DNA damage response in filamentous fungi, cfp genes of Neurospora, developmental gene sequences, site-specific recombination, heterologous gene expression, hybridization and microarray technology to enumerate biomass. This volume also analyse the current knowledge in the area of hydrophobins and genetic regulation of carotenoid biosynthesis. Over fifty world renowned scientist from both industry and academics provided in-depth information in the field of fungal genes and genomics.
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