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IEEE Antennas and Propagation Magazine

Issue 4 • Date Aug. 2013

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Displaying Results 1 - 25 of 102
  • [Front cover]

    Publication Year: 2013, Page(s): c1
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  • CST STUDIO SUITE [Advertisement]

    Publication Year: 2013, Page(s): c2
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  • Table of contents

    Publication Year: 2013, Page(s):3 - 5
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  • Information for Contributors

    Publication Year: 2013, Page(s): 6
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  • Magazine Staff

    Publication Year: 2013, Page(s):7 - 10
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  • AP-S Officers and Administrative Committee

    Publication Year: 2013, Page(s): 11
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  • Feature Articles and Contributions Solicited

    Publication Year: 2013, Page(s): 11
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  • President's Message

    Publication Year: 2013, Page(s):12 - 14
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  • 2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting [Call for papers]

    Publication Year: 2013, Page(s):15 - 16
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  • High-Frequency Techniques in Diffraction Theory: 50 Years of Achievements in GTD, PTD, and Related Approaches (Second Part)

    Publication Year: 2013, Page(s):17 - 19
    Cited by:  Papers (5)
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  • Corrections and Notes

    Publication Year: 2013, Page(s): 20
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  • Diffraction by Canonical Metallic and Material-Coated Structures: A Review

    Publication Year: 2013, Page(s):21 - 31
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2557 KB) | HTML iconHTML

    Keller's landmark paper in 1962 formulated the Geometrical Theory of Diffraction (GTD). This was the beginning of a long process that brought the Geometrical Theory of Diffraction into practice, making it one of the most ubiquitous analysis methods in electromagnetics. This paper provides a personal historical trace of the Geometrical Theory of Diffraction: in particular, its further development i... View full abstract»

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  • 50 years with J. B. Keller's Geometrical Theory of Diffraction in Denmark - Revisiting the Theory: Impedance Half-Plane Diffraction Coefficients

    Publication Year: 2013, Page(s):32 - 40
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2421 KB) | HTML iconHTML

    In the introduction, Danish contributions to J. B. Keller's Geometrical Theory of Diffraction are surveyed. The edge diffraction coefficient in the case of scattering by a half-plane with an impedance surface is then analyzed. In short-wavelength scattering theory, the amplitudes of the incident and the reflected rays are of the same order of magnitude. The consequence of this point of view for th... View full abstract»

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  • Changes of Address or Delivery Problems

    Publication Year: 2013, Page(s): 40
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  • Correction

    Publication Year: 2013, Page(s): 40
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  • Getting the Magazine by Air Freight

    Publication Year: 2013, Page(s): 40
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  • The Uniform Geometrical Theory of Diffraction and Some of Its Applications

    Publication Year: 2013, Page(s):41 - 69
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7265 KB) | HTML iconHTML

    Keller introduced his Geometrical Theory of Diffraction (GTD) in the 1950s. The Geometrical Theory of Diffraction development was revolutionary, in that it explained the phenomena of wave diffraction entirely in terms of rays for the first time, via a systematic generalization of Fermat's principle. In its original form, the Geometrical Theory of Diffraction exhibited singularities at and near ray... View full abstract»

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  • Postface

    Publication Year: 2013, Page(s):70 - 71
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    In early 1944, I got a job in the Columbia University Divi sion of War Research, to work on sonar. My boss, Henry Primakoff, asked me to help him analyze the scattering of sound by a dome. This is a thin, streamlined aluminum shell, which surrounds a projector. The projector emits a pulse of sound waves, and then acts as a hydrophone to detect any waves reflected by a submarine. We obtained a Kirc... View full abstract»

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  • Correction

    Publication Year: 2013, Page(s): 71
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  • Our Personal Selection of HF Techniques Books on Antennas and Scattering Problems

    Publication Year: 2013, Page(s):72 - 79
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  • Angora: A Free Software Package for Finite-Difference Time-Domain Electromagnetic Simulation

    Publication Year: 2013, Page(s):80 - 93
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3322 KB) | HTML iconHTML

    Angora is a free, open-source software package implementing the Finite-Difference Time-Domain (FDTD) Method. This article explains how to access and use Angora, and introduces its features. Examples of its configuration and use are given. These include treatment of planar stratified and random materials, the creation of current sources and incident beams, near-field-to-far-field transformation, op... View full abstract»

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  • An Exposition on the Choice of the Proper S Parameters in Characterizing Devices Including Transmission Lines with Complex Reference Impedances and a General Methodology for Computing Them

    Publication Year: 2013, Page(s):94 - 112
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2572 KB) | HTML iconHTML

    The purpose of this paper is to demonstrate that the recently published paper [1] dealing with little known facts and some new results on transmission lines is due to an incomplete interpretation of the nonphysical artifacts resulting from a particular mathematical model for the S parameters. These artifacts are not real and do not exist when a different form of the S parameters is used.The first ... View full abstract»

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  • Cellular Phone Antenna with a Small Irradiation of the Human Head

    Publication Year: 2013, Page(s):113 - 127
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2390 KB) | HTML iconHTML

    A compensation method for reducing the irradiation of the head of a cellular phone user without degradation of the far field is analyzed. This method uses two radiators that are located in the near region of each other, and create a weak field area in this region. The impacts of the mutual coupling between closely located radiators on the input impedance, current distribution, and fields of the ra... View full abstract»

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  • [Advertisement]

    Publication Year: 2013, Page(s): 127
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  • A Novel CP Antenna for UHF RFID Handheld Reader

    Publication Year: 2013, Page(s):128 - 137
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3689 KB) | HTML iconHTML

    A novel antenna for UHF radio-frequency identification (RFID) readers with circular polarization (CP) operation is proposed in this paper. The antenna consists of a 50 Ω microstrip feed line, two resonant paths on the upper surface of the substrate, and a system ground on the lower surface of the substrate. By adjusting the parameters of the two resonant paths, a circularly polarized reader... View full abstract»

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Mahta Moghaddam