Xem 1-20 trên 52 kết quả Antennas design
  • In the last 40 years, the microstrip antenna has been developed for many communication systems such as radars, sensors, wireless, satellite, broadcasting, ultra-wideband, radio frequency identifications (RFIDs), reader devices etc. The progress in modern wireless communication systems has dramatically increased the demand for microstrip antennas. In this book some recent advances in microstrip antennas are presented.

    pdf0p cucdai_1 20-10-2012 47 10   Download

  • This book explores both the state-of-the-art and the latest achievements in UWB antennas and propagation. It has taken a theoretical and experimental approach to some extent, which is more useful to the reader. The book highlights the unique design issues which put the reader in good pace to be able to understand more advanced research.

    pdf0p cucdai_1 19-10-2012 24 5   Download

  • State-of-the-Art Antenna Technology: The 2008 Antenna Applications Symposium From: Vol. 52 | No. 1 | January 2009 | Page 24 by Daniel Schaubert, University of Massachusetts; Jennifer Bernhard, University of Illinois; Robert Mailloux, US Air Force Research Laboratory; W. Devereux Palmer, US Army Research Office The Antenna Applications Symposium and its predecessor, the Air Force Antenna Symposium, have for more than 50 years provided a unique forum for exchange of ideas and information about the practical aspects of antenna design, development and use in systems....

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  • After providing the basic background in electromagnetic theory necessary to utilize the software, the author of Ebook Antenna and EM Modeling with Matlab describes the benefits and many practical uses of the Matlab. Sergey Makarov's text utilizes the widely used Matlab(r) software, which offers a more flexible and affordable alternative to other antenna and electromagnetic modeling tools currently available.

    pdf284p batman_lvt 03-03-2011 111 57   Download

  • THE ELECTRICAL ENGINEERING AND APPLIED SIGNAL PROCESSING SERIES Edited by Alexander Poularikas The Advanced Signal Processing Handbook: Theory and Implementation for Radar, Sonar, and Medical Imaging Real-Time Systems Stergios Stergiopoulos The Transform and Data Compression Handbook K.R. Rao and P.C. Yip Handbook of Multisensor Data Fusion David Hall and James Llinas Handbook of Neural Network Signal Processing Yu Hen Hu and Jenq-Neng Hwang Handbook of Antennas in Wireless Communications Lal Chand Godara Noise Reduction in Speech Applications Gillian M.

    pdf458p dieutan 17-05-2010 92 47   Download

  • The third editionof Antenna Theory is designed to meet the needs of electrical engineering and physics students at the senior undergraduate and beginning graduate levels, and those of practicing engineers.

    pdf1073p oruku2009 13-11-2013 71 20   Download

  • This book provides some recent advances in design nanometer VLSI chips. The selected topics try to present some open problems and challenges with important topics ranging from design tools, new post-silicon devices, GPU-based parallel computing, emerging 3D integration, and antenna design.

    pdf302p cucdai_1 16-10-2012 67 16   Download

  • An ultrawideband (UWB) pentagon shape planar microstrip slot antenna is presented that can find applications in wireless communications. Combination of the pentagon shape slot, feed line and pentagon stub are used to obtain 124% (2.65–11.30 GHz) impedance bandwidth which exceeds the UWB requirement of 110% (3.10–10.60 GHz). A ground plane of 50 mm 80 mm size is used which is similar to wireless cards for several portable wireless communication devices. The proposed antenna covers only the top 20 mm or 25% of the ground plane length, which leaves enough space for the RF circuitry.

    pdf7p vanminhphuong 18-01-2011 83 14   Download

  • Mobile and wireless communications applications have clear impact on improving the humanity wellbeing. From cell phones to wireless internet to home and office devices, most of the applications are converted from wired into wireless communication. Smart and advanced wireless communication environments represent the future technology and evolutionary development step in home, hospitals, industrial, and vehicular and transportation systems.

    pdf0p 123859674 30-06-2012 61 13   Download

  • As the growing demand formobile communications is constantly increasing, the need for better coverage, improved capacity and higher transmission quality rises. Thus, a more efficient use of the radio spectrum is required. Smart antenna systems are capable of efficiently utilizing the radio spectrum and, thus, is a promise for an effective solution to the present wireless systems’ problems while achieving reliable and robust high-speed high-data-rate transmission. The purpose of this book is to provide the reader a broad viewof the systemaspects of smart antennas.

    pdf180p kuckucucu 15-05-2012 49 9   Download

  • dipole antenna is a radio antenna that can be made of a simple wire, with a center-fed driven element. It consists of two metal conductors of rod or wire, oriented parallel and collinear with each other (in line with each other), with a small space between them. The radio frequency voltage is applied to the antenna at the center, between the two conductors. These antennas are the simplest practical antennas from a theoretical point of view.

    pdf129p bachduong1311 07-12-2012 31 7   Download

  • The book addresses practical engineering issues that antenna professionals have to deal with. It explains the immediate demands for existing systems; discusses the antenna technology for the latest and emerging applications, and gives comprehensive coverage of hot topics in the wireless industry. Issues including design considerations, engineering design, measurement setup and methodology, and practical applications are all covered in depth.

    pdf307p ken333 06-07-2012 37 6   Download

  • 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

    pdf53p beobobeo 01-08-2012 34 6   Download

  • Novel generation wireless system is a packet switched wireless system with wide area coverage and high throughput. It is designed to be cost effective and to provide high spectral efficiency . The 4th wireless uses Orthogonal Frequency Division Multiplexing, Ultra Wide Radio Band and millimeter wireless and smart antenna. Highly directive, planar UWB antennas are gaining more and more attention, as required in many novel and important applications.

    pdf0p 123859674 02-07-2012 44 5   Download

  • The research, simulation and design dual band antenna which operates at 900MHz and 2.45GHz are conducted. FR4-epoxy substrate is chosen with thickness h = 1.5mm, εr = 4.4. Dual band can be achieved by using different methods of impedance’s matching for single antenna which is originally designed at 900MHz. Some dual band RFID structures are discussed in this paper.

    pdf5p tuanlocmuido 13-12-2012 24 5   Download

  • This book deal with the modern developing of microwave and millimeter wave technologies. The first chapter is aimed at describing the evolution of technological processes for the design of passive functions in millimetre-wave frequency range. From the results HR SOI seems to be a good candidate in the coming year to address both low cost and low power mass market CMOS digital and RF/ MMW applications.

    pdf0p 123859674 02-07-2012 35 4   Download

  • This paper concentrates on studying, designing and manufacturing a dual – band and high – bandwidth antenna applied for advance mobile handsets. This antenna can work in GSM/UMTS bands by generating two resonant modes of 900 MHz and 1900 MHz frequencies. Antenna is printed on FR4 substrate with size of 58 mm x 80 mm, thickness of 1.6 mm and relative permittivity of 4.4. The propose antenna is experimentally studied. Keywords: Antenna, dual-band, monopole, microstrip antenna.

    pdf5p tuanlocmuido 13-12-2012 16 3   Download

  • The Topic of microstrip antennas is an old subject that started over 40 years ago. Microstrip antennas are low profile and easily fabricated. This subject has passed through several stages that make it survive tell now and still in continues progress. The main stage is the development of low loss low cost dielectric materials that make it possible to design an effi‐ cient low profile microstrip patches. The stage of developing analysis methods and models that helped in the design of radiating...

    pdf0p lyly_5 22-03-2013 16 2   Download

  • This book provides a comprehensive introduction to the underlying theory, design techniques and analytical tools of wireless communications, focusing primarily on the core principles of wireless system design. The book begins with an overview of wireless systems and standards. The characteristics of the wireless channel are then described, including their fundamental capacity limits. Various modulation, coding, and signal processing schemes are then discussed in detail, including state-of-the-art adaptive modulation, multicarrier, spread spectrum, and multiple antenna techniques....

    pdf0p huemanvdoc 20-11-2009 158 50   Download

  • You will understand the physical meaning behind the mathematics of wireless signals and learn the intricacies and tradeoffs in signal selection and design.

    pdf903p dangkhoa1612 18-05-2013 76 41   Download

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