Resultados de Pesquisa

INGLÊS

Implanted Antennas In Medical Wireless Communications

de Jaehoon Kim e Yahya Rahmat-Samii

37,09€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 One of the main objectives of this lecture is to summarize the results of recent research activities of the authors on the subject of implanted antennas for medical wireless communication systems.
INGLÊS

Tunable Materials With Applications In Antennas And Microwaves

de George A. Kyriacou e John N. Sahalos

72,86€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Tunable Materials with Applications in Antennas and Microwaves is a stimulating topic in these modern times. With the explosion of the new generation of the wireless world, greater emphasis than ever before is being placed on the analysis and applications of modern materials. This book describes the characteristics of Ferrites and Ferroelectrics and introduces the reader to Multiferroics.<ol><li>Represents, in a simple manner, the solid state physics and explains the permittivity and permeability tensor characteristics for the tunable materials of infinite and finite dimensions.</li> <li>Gives the applications of tunable materials in resonators, filters, microstrips, striplines, antennas, phase shifters, capacitors, varactors, and frequency selective surfaces.</li> <li>Describes in detail the mathematical analysis for spin and magnetostatic waves for infinite medium, thin slab films, and finite circular discs. The analysis contains original work, which the reader may extend in the future.</li> <li>Provides multiferroics, which are ferrite and ferroelectric composites. Multiferroics are very promising tunable materials which are believed will offer many applications in the near future.</li> <li>Contains the planar transmission lines with analytic formulas for multilayer microstrips, transmission lines, and waveguides with isotropic as well as anisotropic dielectric and magnetic materials. Also, gives the formulas to analyze the layered category of transmission lines with multiferroics.</li></ol>This book is intended for antenna and microwave engineers as well as for graduate students of Materials Science and Engineering, Electrical & Computer Engineering, and Physics Departments.
INGLÊS

Introduction To Smart Antennas

de Constantine A. Balanis e Panayiotis I. Ioannides

37,09€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 In fact, smart antenna systems comprise several critical areas such as individual antenna array design, signal processing algorithms, space-time processing, wireless channel modeling and coding, and network performance.
INGLÊS

Design Of Reconfigurable Antennas Using Graph Models

de Christos Christodoulou, Joseph Costantine e Youssef Tawk

54,06€ + 10% EM CARTÃO

portes grátis

 This lecture discusses the use of graph models to represent reconfigurable antennas. These models help designers understand reconfigurable antenna structures and enhance their functionality since they transform antennas from bulky devices into mathematical and software accessible models.
INGLÊS

Meta-Smith Charts And Their Potential Applications

de Danai Torrungrueng

37,84€ + 10% EM CARTÃO

portes grátis

 This book presents the developments and potential applications of Meta-Smith charts, which can be applied to practical and useful transmission line problems (e.g., metamaterial transmission lines and nonreciprocal transmission lines).
INGLÊS

Generalized Transmission Line Method To Study The Far-Zone Radiation Of Antennas Under A Multilayer Structure

de Ahmed A. Kishk, Allen W. Glisson e Zuan Hui Wu

33,79€ + 10% EM CARTÃO

portes grátis

 This book gives a step-by-step presentation of a generalized transmission line method to study the far-zone radiation of antennas under a multilayer structure.
INGLÊS

Narrowband Direction Of Arrival Estimation For Antenna Arrays

de Andreas Spanias, Jeffrey Foutz e Mahesh Banavar

33,79€ + 10% EM CARTÃO

portes grátis

 This book provides an introduction to narrowband array signal processing, classical and subspace-based direction of arrival (DOA) estimation with an extensive discussion on adaptive direction of arrival algorithms.
INGLÊS

Electronically Scanned Arrays

de Robert J. Mailloux

37,84€ + 10% EM CARTÃO

portes grátis

 Scanning arrays present the radar or communications engineer with the ultimate in antenna flexibility.
INGLÊS

Antennas With Non-Foster Matching Networks

de James T. Aberle e Robert Loepsinger-Romak

33,79€ + 10% EM CARTÃO

portes grátis

 Most antenna engineers are likely to believe that antennas are one technology that is more or less impervious to the rapidly advancing semiconductor industry.
INGLÊS

Implanted Antennas In Medical Wireless Communications

de Jaehoon Kim e Yahya Rahmat-Samii

37,84€ + 10% EM CARTÃO

portes grátis

 One of the main objectives of this lecture is to summarize the results of recent research activities of the authors on the subject of implanted antennas for medical wireless communication systems.
INGLÊS

Tunable Materials With Applications In Antennas And Microwaves

de George A. Kyriacou e John N. Sahalos

74,34€ + 10% EM CARTÃO

portes grátis
INGLÊS

Analysis And Design Of Transmitarray Antennas

de Ahmed H. Abdelrahman, Atef Z. Elsherbeni, Fan Yang e Payam Nayeri

60,82€ + 10% EM CARTÃO

portes grátis
INGLÊS

Reconfigurable Antennas

de Jennifer T. Bernhard

33,79€ + 10% EM CARTÃO

portes grátis
INGLÊS

Analysis And Design Of Transmitarray Antennas

de Ahmed H. Abdelrahman, Atef Z. Elsherbeni, Fan Yang e Payam Nayeri

59,61€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 In recent years, transmitarray antennas have attracted growing interest with many antenna researchers. Transmitarrays combines both optical and antenna array theory, leading to a low profile design with high gain, high radiation efficiency, and versatile radiation performance for many wireless communication systems. In this book, comprehensive analysis, new methodologies, and novel designs of transmitarray antennas are presented. <ul> <li>Detailed analysis for the design of planar space-fed array antennas is presented. The basics of aperture field distribution and the analysis of the array elements are described. The radiation performances (directivity and gain) are discussed using array theory approach, and the impacts of element phase errors are demonstrated.</li> <li>The performance of transmitarray design using multilayer frequency selective surfaces (M-FSS) approach is carefully studied, and the transmission phase limit which are generally independent from the selection ofa specific element shape is revealed. The maximum transmission phase range is determined based on the number of layers, substrate permittivity, and the separations between layers.</li> <li>In order to reduce the transmitarray design complexity and cost, three different methods have been investigated. As a result, one design is performed using quad-layer cross-slot elements with no dielectric material and another using triple-layer spiral dipole elements. Both designs were fabricated and tested at X-Band for deep space communications. Furthermore, the radiation pattern characteristics were studied under different feed polarization conditions and oblique angles of incident field from the feed.</li> <li>New design methodologies are proposed to improve the bandwidth of transmitarray antennas through the control of the transmission phase range of the elements. These design techniques are validated through the fabrication and testing of two quad-layer transmitarray antennas at Ku-band.</li><li>A single-feed quad-beam transmitarray antenna with 50 degrees elevation separation between the beams is investigated, designed, fabricated, and tested at Ku-band.</li></ul> In summary, various challenges in the analysis and design of transmitarray antennas are addressed in this book. New methodologies to improve the bandwidth of transmitarray antennas have been demonstrated. Several prototypes have been fabricated and tested, demonstrating the desirable features and potential new applications of transmitarray antennas.
INGLÊS

Electronically Scanned Arrays

de Robert J. Mailloux

37,09€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Scanning arrays present the radar or communications engineer with the ultimate in antenna flexibility.
INGLÊS

Reconfigurable Antennas

de Jennifer T. Bernhard

33,11€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 This lecture explores the emerging area of reconfigurable antennas from basic concepts that provide insight into fundamental design approaches to advanced techniques and examples that offer important new capabilities for next-generation applications. Antennas are necessary and critical components of communication and radar systems, but sometimes their inability to adjust to new operating scenarios can limit system performance. Making antennas reconfigurable so that their behavior can adapt with changing system requirements or environmental conditions can ameliorate or eliminate these restrictions and provide additional levels of functionality for any system. For example, reconfigurable antennas on portable wireless devices can help to improve a noisy connection or redirect transmitted power to conserve battery life. In large phased arrays, reconfigurable antennas could be used to provide additional capabilities that may result in wider instantaneous frequency bandwidths, more extensive scan volumes, and radiation patterns with more desirable side lobe distributions. Written for individuals with a range of experience, from those with only limited prior knowledge of antennas to those working in the field today, this lecture provides both theoretical foundations and practical considerations for those who want to learn more about this exciting subject. Contents: Introduction / Definitions of Critical Parameters for Antenna Operation / Linkage Between Frequency Response and Radiation Characteristics: Implications for Reconfigurable Antennas / Methods for Achieving Frequency Response Reconfigurability / Methods for Achieving Polarization Reconfigurability / Methods for Achieving Radiation Pattern Reconfigurability / Methods for Achieving Compound Reconfigurable Antennas / Practical Issues for Implementing Reconfigurable Antennas / Conclusions and Directions for Future work
INGLÊS

Generalized Transmission Line Method To Study The Far-Zone Radiation Of Antennas Under A Multilayer Structure

de Ahmed A. Kishk, Allen W. Glisson e Zuan Hui Wu

33,11€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 This book gives a step-by-step presentation of a generalized transmission line method to study the far-zone radiation of antennas under a multilayer structure.
INGLÊS

Design Of Reconfigurable Antennas Using Graph Models

de Christos Christodoulou, Joseph Costantine e Youssef Tawk

52,99€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 This lecture discusses the use of graph models to represent reconfigurable antennas. These models help designers understand reconfigurable antenna structures and enhance their functionality since they transform antennas from bulky devices into mathematical and software accessible models.
INGLÊS

Meta-Smith Charts And Their Potential Applications

de Danai Torrungrueng

37,09€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 This book presents the developments and potential applications of Meta-Smith charts, which can be applied to practical and useful transmission line problems (e.g., metamaterial transmission lines and nonreciprocal transmission lines).
INGLÊS

Multiantenna Systems For Mimo Communications

de Alfred Grau, Franco De Flaviis, Jordi Romeu e Llui Jofre

46,36€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Advanced communication scenarios demand the development of new systemswhere antenna theory, channel propagation and communication models are seen from a common perspective as a way to understand and optimize the system as a whole. In this context, a comprehensive multiantenna formulation for multiple-input multiple-output systems is presented with a special emphasis on the connection of the electromagnetic and communication principles. Starting from the capacity for amultiantenna system, the book reviews radiation, propagation, and communicationmechanisms, paying particular attention to the vectorial, directional, and timefrequency characteristics of the wireless communication equation for low- and high-scattering environments. Based on the previous concepts, different spacetime methods for diversity and multiplexing applications are discussed, multiantenna modeling is studied, and specific tools are introduced to analyze the antenna coupling mechanisms and formulate appropriate decorrelation techniques.Miniaturization techniques for closely spaced antennas are studied, and its fundamental limits and optimization strategies are reviewed. Finally, different practical multiantenna topologies for new communication applications are presented, and its main parameters discussed. A relevant feature is a collection of synthesis exercises that review the main topics of the book and introduces state-of-the art system architectures and parameters, facilitating its use either as a text book or as a support tool for multiantenna systems design. Table of Contents: Principles of Multiantenna Communication Systems / The Radio Channel for MIMO Communication Systems / Coding Theory for MIMO Communication Systems / Antenna Modeling for MIMO Communication Systems / Design of MPAs for MIMO Communication Systems / Design Examples and Performance Analysis of Different MPAs / References / List of Acronyms / List of Symbols / Operators and Mathematical Symbols
INGLÊS

Narrowband Direction Of Arrival Estimation For Antenna Arrays

de Andreas Spanias, Jeffrey Foutz e Mahesh Banavar

33,11€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 This book provides an introduction to narrowband array signal processing, classical and subspace-based direction of arrival (DOA) estimation with an extensive discussion on adaptive direction of arrival algorithms.
INGLÊS

Antennas With Non-Foster Matching Networks

de James T. Aberle e Robert Loepsinger-Romak

33,11€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Most antenna engineers are likely to believe that antennas are one technology that is more or less impervious to the rapidly advancing semiconductor industry. However, as demonstrated in this lecture, there is a way to incorporate active components into an antenna and transform it into a new kind of radiating structure that can take advantage of the latest advances in analog circuit design. The approach for making this transformation is to make use of non-Foster circuit elements in the matching network of the antenna. By doing so, we are no longer constrained by the laws of physics that apply to passive antennas. However, we must now design and construct very touchy active circuits. This new antenna technology is now in its infancy. The contributions of this lecture are (1) to summarize the current state-of-the-art in this subject, and (2) to introduce some new theoretical and practical tools for helping us to continue the advancement of this technology.
INGLÊS

Multiantenna Systems For Mimo Communications

de Alfred Grau, Franco De Flaviis, Jordi Romeu e Llui Jofre

47,30€

portes grátis

ESGOTADO OU NÃO DISPONÍVEL
INGLÊS

Introduction To Smart Antennas

de Constantine A. Balanis e Panayiotis I. Ioannides

37,84€

portes grátis

ESGOTADO OU NÃO DISPONÍVEL

 In fact, smart antenna systems comprise several critical areas such as individual antenna array design, signal processing algorithms, space-time processing, wireless channel modeling and coding, and network performance.
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