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IEEE Antennas and Propagation Magazine

Issue 4 • Date Aug. 2008

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Displaying Results 1 - 25 of 62
  • Front cover - IEEE Antennas and Propagation Magazine

    Publication Year: 2008, Page(s): c1
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  • Table of contents

    Publication Year: 2008, Page(s): 3
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  • Information for contributors

    Publication Year: 2008, Page(s): 4
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  • Magazine staff

    Publication Year: 2008, Page(s):5 - 6
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  • AP-S Officers and Administrative Committee

    Publication Year: 2008, Page(s): 7
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  • Editor's comments

    Publication Year: 2008, Page(s):8 - 233
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  • President's message

    Publication Year: 2008, Page(s):8 - 9
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  • Call for papers

    Publication Year: 2008, Page(s): 10
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  • 2009 IEEE Antennas and Propagation Society membership application

    Publication Year: 2008, Page(s): 11
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  • Solving large complex problems using a higher-order basis: parallel in-core and out-of-core integral-equation solvers

    Publication Year: 2008, Page(s):13 - 30
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (11557 KB) | HTML iconHTML

    The future of computational electromagnetics is changing drastically with the new generation of computer chips, which are multi-cored instead of single-cored. Previously, advancements in chip technology meant an increase in clock speed, which was typically a benefit that computational code users could enjoy. This is no longer the case. In the new roadmaps for chip manufacturers, speed has been sac... View full abstract»

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  • Reflectarray research at the communications research centre Canada

    Publication Year: 2008, Page(s):31 - 52
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (14758 KB) | HTML iconHTML

    It has been a decade since a research program began on reflectarray technology at the Communications Research Centre Canada (CRC). This endeavor has demonstrated the advantages and shortcomings of this technology, the issues that ought to be addressed, and future opportunities. This paper summarizes the outcome of this research in the context of projects that have been carried out, and the resulti... View full abstract»

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  • A phase shifter with one tunable component for a reflectarray antenna

    Publication Year: 2008, Page(s):53 - 65
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7599 KB) | HTML iconHTML

    The combination of a dipole and a tunable varactor forms a phase shifter with one tunable component that provides a phase shift over a wide range, from 0deg to nearly 360deg. The dipole, loaded with a tunable varactor, is used as a patch component of a low-profile reflectarray antenna. An economic assessment shows that the production price of the suggested phase shifter with one tunable component ... View full abstract»

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  • Maximum electric and magnetic field strengths at a given distance from some ideal antennas

    Publication Year: 2008, Page(s):66 - 71
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4012 KB) | HTML iconHTML

    This paper is about the computation of the maximum electric and magnetic field strengths at a given distance of an antenna, close to the antenna, the maximum being taken over all orientations. We provide closed-form expressions for the maximum field strengths produced in free space by three important ideal antennas: the electric Hertzian dipole, the magnetic Hertzian dipole, and the half-wave dipo... View full abstract»

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  • Prototype antenna elements for the next-generation TDRS enhanced multiple-access array

    Publication Year: 2008, Page(s):72 - 83
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8013 KB) | HTML iconHTML

    This paper summarizes a study performed to produce prototype antenna elements for the next-generation enhanced Tracking and Data Relay Satellite Continuation (TDRS-C) multiple-access (MA) S-band phased-array antenna. Compared to the multiple-access antenna on the current class of TORS, the enhanced multiple-access antenna requires elements that achieve greater on-axis gain, simultaneous circular p... View full abstract»

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  • Development of separated turnstile antenna for space applications

    Publication Year: 2008, Page(s):84 - 93
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5869 KB) | HTML iconHTML

    Dual-band operation and circular polarization are the main characteristics of the separated turnstile (ST) antenna that make it suitable for space applications. In this paper, we describe the design and optimization of a separated turnstile antenna to obtain a saddle-shaped pattern in the UHF band and an omnidirectional pattern in the VHF band, with simultaneous impedance matching in both bands. T... View full abstract»

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  • Numerical analysis of dielectric lens antennas using a ray-tracing method and HFSS software

    Publication Year: 2008, Page(s):94 - 101
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4174 KB) | HTML iconHTML

    In this paper, we use for the first time the ray-tracing method combined with the HFSS software to analyze lens antennas. HFSS is a very popular commercial tool that can provide very accurate results for the simulation of antennas. However, because of limitations on computational resources, it is hard to apply to solving large electromagnetic problems. In this paper, HFSS is used to simulate the f... View full abstract»

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  • National Radio Science Meeting

    Publication Year: 2008, Page(s): 102
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  • Chapter news

    Publication Year: 2008, Page(s):104 - 106
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  • Call for papers ANTEM/URSI 2009

    Publication Year: 2008, Page(s): 107
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  • The SUMMA Graduate Fellowships in Advanced Electromagnetics

    Publication Year: 2008, Page(s): 108
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  • AP-S Distinguished Lecturer Program

    Publication Year: 2008, Page(s):109 - 110
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  • Revisiting medium-wave ground-system requirements

    Publication Year: 2008, Page(s):111 - 114
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1911 KB) | HTML iconHTML

    The classic 1937 paper by Brown, Lewis, and Epstein [1] outlined the necessity for a proper ldquoimaging screenrdquo or ldquoground systemrdquo for efficient operation of a vertically polarized monopole antenna. While Brown et al. showed the effects of various configurations, they did not exhaustively examine the effects of successive reductions of the number of radials, particularly in systems wi... View full abstract»

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  • Report on the 2008 AP-S Symposium student paper contest

    Publication Year: 2008, Page(s): 116
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  • Announcement and call for papers

    Publication Year: 2008, Page(s): 117
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  • Practical uncertainty of pulse power measurements in Ka-band RCS instrumentation

    Publication Year: 2008, Page(s):120 - 125
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3484 KB) | HTML iconHTML

    The output level of pulsed radar transmitter and receiver test sets can be defined with spectrum analyzers and diode detectors. Modern analyzers, which have 10 MHz or wider resolution bandwidths and cover appropriate input frequency ranges, can be used in the Ka- and V-band radar domains for pulse widths above about 200 ns. A practical uncertainty of 2 dB is obtainable. External mixers seem to sho... View full abstract»

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

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Mahta Moghaddam