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IEEE Antennas and Propagation Magazine

Issue 4 • Aug. 2010

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Displaying Results 1 - 25 of 67
  • [Front cover]

    Publication Year: 2010, Page(s): c1
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  • Table of contents

    Publication Year: 2010, Page(s): 3
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  • Information for contributors

    Publication Year: 2010, Page(s): 4
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  • Magazine staff

    Publication Year: 2010, Page(s):5 - 6
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  • AP-S Officers and Administrative Committee

    Publication Year: 2010, Page(s): 7
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  • Feature Articles and Contributions Solicited

    Publication Year: 2010, Page(s): 7
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  • Editor's comments

    Publication Year: 2010, Page(s):8,224 - 225
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  • President's Message

    Publication Year: 2010, Page(s):8 - 9
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  • 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting

    Publication Year: 2010, Page(s): 10
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  • Instructions for AP-S & and URSI Authors

    Publication Year: 2010, Page(s):11 - 12
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  • Steering Committee Contacts

    Publication Year: 2010, Page(s): 13
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  • An RFID Tag Antenna Tolerant to Mounting on Materials

    Publication Year: 2010, Page(s):14 - 19
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2126 KB) | HTML iconHTML

    This paper presents a novel UHF RFID tag antenna for mass-retailed products. The tag is realized on low-cost material. The antenna is composed of two elements: a planar dipole-based antenna, matched with a small inductive coil. In particular, it is able to work when directly mounted on different materials. When the permittivity or the thickness of the material on which it is mounted changes, the a... View full abstract»

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  • The Unwinding of a Transformer

    Publication Year: 2010, Page(s):20 - 30
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2713 KB) | HTML iconHTML

    The usefulness of passive radio-frequency identification (RFID) and general passive sensor technology is currently limited by relatively low field strengths due to regulations, giving a notoriously short reader-to-tag link range. The energizing and thus communication strength from receiver to detector depends on the amount of dc voltage that a chip can rectify from an interrogating electromagnetic... View full abstract»

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  • Change of address or delivery problems

    Publication Year: 2010, Page(s): 30
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  • To All IEEE Life Members

    Publication Year: 2010, Page(s): 30
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  • Getting the magazine by air freight

    Publication Year: 2010, Page(s): 30
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  • A CPW-Fed Printed Loop Antenna for Ultra-Wideband Applications, and its Linear-Array Performance

    Publication Year: 2010, Page(s):31 - 40
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2736 KB) | HTML iconHTML

    A small CPW-fed loop antenna is described. The single antenna has a measured relative impedance bandwidth of 70%. Radiation patterns show stable co-polar and low cross-polar characteristics within the specified bandwidth. The small size of the radiator (0.5λ at 13.6 GHz) makes it suitable for being used in linear-array applications. The linear-array performance of the antenna is investigate... View full abstract»

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  • Cognitive-Radio Systems for Spectrum, Location, and Environmental Awareness

    Publication Year: 2010, Page(s):41 - 61
    Cited by:  Papers (21)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1862 KB) | HTML iconHTML

    In order to perform reliable communications, a system needs to have sufficient information about its operational environment, such as spectral resources and propagation characteristics. Cognitive-radio technology has capabilities for acquiring accurate spectrum, location, and environmental information, due to its unique features such as spectrum, location, and environmental awareness. The goal of ... View full abstract»

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  • A Multi-Feed Receiver in the 18 to 26.5 GHz Band for Radio Astronomy

    Publication Year: 2010, Page(s):62 - 72
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4220 KB) | HTML iconHTML

    A large-bandwidth, state-of-the-art multi-feed receiver has been constructed to be used on the new 64 m Sardinia Radio Telescope (SRT) (http://www.srt.inaf.itl), an antenna aiming to work from 300 MHz to 100 GHz with an almost continuous frequency coverage. The goal of this new receiver is to speed up the survey of the sky with high sensitivity in a frequency band that is very interesting to radio... View full abstract»

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  • On the Reflection Characteristics of a Reflectarray Element with Low-Loss and High-Loss Substrates

    Publication Year: 2010, Page(s):73 - 89
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6854 KB) | HTML iconHTML

    This paper revisits the loss phenomenon (particularly, the dielectric loss) for a microstrip patch in reflectarray mode, and discusses the reflection characteristics (magnitude and phase) for a reflectarray element with low- and high-loss substrates. First, the dielectric losses that occur in a lossy slab backed by a perfect electric conductor are both analytically and numerically investigated. Us... View full abstract»

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  • A Novel Split-Step Parabolic-Equation Package for Surface-Wave Propagation Prediction Along Multiple Mixed Irregular-Terrain Paths

    Publication Year: 2010, Page(s):90 - 97
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1381 KB) | HTML iconHTML

    A novel MATLAB™-based split-step parabolic-equation (SSPE) propagation package is introduced for the prediction of electromagnetic surface-wave attenuation along multiple mixed irregular and lossy paths. The impedance boundary condition is implemented via the discrete mixed Fourier transform (DMFT). Irregular terrain modeling is handled via coordinate transformation. Tests are performed alo... View full abstract»

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  • Chapter News

    Publication Year: 2010, Page(s):98 - 99
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (243 KB) | HTML iconHTML

    First of all, on behalf of the IEEE Antennas and Propagation Society, I would like to congratulate Prof. Kam Weng Tam and his team at the University of Macau on the successful formation of the IEEE Macau Section Antennas & Propagation and Microwave Theory & Techniques Joint Societies Chapter. View full abstract»

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  • AP-S Distinguished Lecturer Program for 2009–2010

    Publication Year: 2010, Page(s): 100
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (113 KB) | HTML iconHTML

    The full abstracts of the Distinguished Lecturers' talks and the Lecturers' biographies appeared in the June 2009 issue of the Magazine. This information can also be obtained by sending an email request to info.distlect.ap@ieee.org, or via a link at http://www.ieeeaps.org. View full abstract»

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  • Ultra-Low-Sidelobe-Level Concentric-Ring-Array Pattern Synthesis Using Bessel Neural Networks [Antenna Designer's Notebook]

    Publication Year: 2010, Page(s):102 - 105
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (916 KB) | HTML iconHTML

    The present paper proposes a new approach to constrained optimal pattern synthesis for a circular ring array with ultra-Iow-sidelobe levels. The approach uses an artificial neural network (ANN) with hidden Bessel activation functions, trained using the Levenberg-Marquardt (LM) algorithm. The proposed approach is capable of producing minimal sidelobe levels for an arbitrary pattern shape using only... View full abstract»

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  • Design, Development, and Fabrication of a Traveling-Wave Antenna on a Conical Surface

    Publication Year: 2010, Page(s):106 - 109
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1646 KB) | HTML iconHTML

    A novel design methodology is illustrated, along with the fabrication technique for a wrap-around antenna in the C band on a conical surface. The methodology illustrates an attempt to achieve broadband performance with a thin conformal antenna. An attempt is also made to fabricate such an antenna on the parent body by a progressive lamination process of the layers. Experimental results are shown f... View full abstract»

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Aims & Scope

IEEE Antennas and Propagation Magazine actively solicits feature articles that describe engineering activities taking place in industry, government, and universities

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Meet Our Editors

Editor-in-Chief
Mahta Moghaddam