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IEEE Antennas and Propagation Magazine

Issue 1 • Date Feb. 2012

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Displaying Results 1 - 25 of 60
  • [Front cover]

    Publication Year: 2012, Page(s): c1
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  • Table of contents

    Publication Year: 2012, Page(s): 3
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  • Information for contributors

    Publication Year: 2012, Page(s): 4
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  • [Magazine staff]

    Publication Year: 2012, Page(s):5 - 6
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  • AP-S Officers and Administrative Committee

    Publication Year: 2012, Page(s): 7
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  • Editor's Comments

    Publication Year: 2012, Page(s):8,269 - 273
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  • President's Message

    Publication Year: 2012, Page(s):8 - 9
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  • Welcome Message

    Publication Year: 2012, Page(s):10 - 21
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  • A Novel Approach for Mobile Device Design: GA-Based Distributed Optimization to Comply with OTA, SAR, and HAC Standards

    Publication Year: 2012, Page(s):22 - 31
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5455 KB) | HTML iconHTML

    The objective of this study was to investigate the cost and time effectiveness of virtual prototyping when applied to the optimization of antenna system design for mobile phones, compared to traditional development approaches. For the proposed evaluation, an enhanced commercial FDTD-based electromagnetic simulation platform, powered with GPU hardware acceleration and distributed network paralleliz... View full abstract»

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  • Cancellation of Beam Squint with Frequency in Serial Beamforming Network-Fed Linear Array Antennas

    Publication Year: 2012, Page(s):32 - 39
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1642 KB) | HTML iconHTML

    This communication investigates the capability of serial beamforming networks to cancel beam squint with frequency in linear array applications. Such a property could be of interest for broadband applications with multiple narrow beams. The theoretical aspects are described, as well as the impact on the beamforming network design. It is found that the main limitation to achieving beam-squint cance... View full abstract»

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  • Design Criteria for Near-Field-Focused Planar Arrays

    Publication Year: 2012, Page(s):40 - 50
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2715 KB) | HTML iconHTML

    A detailed performance analysis of near-field-focused planar arrays is addressed. Design curves and performance data are shown for planar square arrays as a function of the array size, the inter-element distance, and the focal distance. The performance curves are compared with results presented in earlier studies relevant to continuous-aperture antennas, as well as with numerical results obtained ... View full abstract»

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  • Design and Performance Aspects of an Adaptive Cylindrical Beamforming Array

    Publication Year: 2012, Page(s):51 - 65
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2960 KB) | HTML iconHTML

    In this article, the design of a cylindrical beamforming array (CBA) is presented. The array is conformed over a ring of a conducting circular cylinder. From the total number of elements, M, of the array, a subset of N successive elements is enabled each time. The selection of the subset is based on the minimization of the angle between its broadside direction and the direction of arrival (DOA) of... View full abstract»

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  • Computation of Fluctuating Wind Pressure and Wind Loads on Phased-Array Antennas

    Publication Year: 2012, Page(s):66 - 75
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1508 KB) | HTML iconHTML

    A necessary step in the design of a high-accuracy antenna system is to establish the signal-error budget due to structural, pointing, and environmental parameters. Wind disturbances are the main source of vibration, and, consequently, of pointing errors of the antenna in the open air. For these purposes, a method for computing the time history of wind pressure and wind loads on antennas within the... View full abstract»

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  • Multiple Circular-Sector Structures for Wideband Planar Monopole Antenna Designs Covering 146% Fractional Bandwidth

    Publication Year: 2012, Page(s):76 - 94
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5072 KB) | HTML iconHTML

    Three wideband planar monopole antennas were designed with multiple circular-sector structures. The radiating elements of the monopoles were composed of multiple circular sectors. These antennas were optimized to satisfy the required omnidirectional radiation pattern for portable devices, and to maximize bandwidth. Simulation and experiment results showed that the antennas reached a fractional ban... View full abstract»

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  • The Complete Surface-Current Distribution in a Normal-Mode Helical Antenna

    Publication Year: 2012, Page(s):95 - 108
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2769 KB) | HTML iconHTML

    An investigation of the surface-current distribution in a normal-mode helical antenna (NMHA) is reported. This enables precise prediction of the performance of normal-mode helical antennas, since traditional wire-antenna simulations ignore important details. A Moment-Method formulation was developed, using two geometrically orthogonal basis functions to represent the total nonuniform surface-curre... View full abstract»

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  • High temperature dielectric constant and loss tangent measurements [advertisement]

    Publication Year: 2012, Page(s): 109
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  • Announcement and Call for Papers

    Publication Year: 2012, Page(s): 110
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  • Report on ISAP2011

    Publication Year: 2012, Page(s):111 - 114
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  • Chapter News

    Publication Year: 2012, Page(s):115 - 120
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  • Empirical Equations for the Resonant Frequencies of a Dual-Band Microstrip Loop Antenna [Antenna Designer's Notebook]

    Publication Year: 2012, Page(s):122 - 125
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1950 KB) | HTML iconHTML

    Empirical formulas are presented for predicting the resonant frequencies of a coplanar-waveguide-fed dual-band microstrip loop antenna. The resonant frequencies predicted by the formulas compared with experiments with an average error of about 1.85%. View full abstract»

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  • Loughborough Antennas & Propagation Conference

    Publication Year: 2012, Page(s): 128
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  • 2011 Killam Prize in Engineering Awarded to Lotfollah Shafai

    Publication Year: 2012, Page(s): 129
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  • On the Direct Non-Redundant Near-Field-to-Far-Field Transformation in a Cylindrical Scanning Geometry

    Publication Year: 2012, Page(s):130 - 138
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3507 KB) | HTML iconHTML

    The experimental validation of a direct near-field-to-far-field transformation technique with cylindrical scanning is presented in this paper. The technique requires a minimum number of near-field measurements. It is based on a non-redundant sampling representation of electromagnetic fields using a spherical modeling of the antenna under test. It allows the evaluation of the antenna's far field di... View full abstract»

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  • Call for Papers: 2012 Antenna Applications Symposium

    Publication Year: 2012, Page(s): 139
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  • Incoherent scattering-center representations and parameterizations for automobiles [EM Programmer's Notebook]

    Publication Year: 2012, Page(s):140 - 148
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4000 KB) | HTML iconHTML

    The requirements for mobile wave-propagation modeling become more and more demanding. This is especially true for automotive radar and for car-to-car or car-to-infrastructure communications, in which none of the antennas has an elevated position, and the consideration of near-field effects becomes mandatory for good wave-propagation modeling results. Due to the complexity of mobile propagation sce... 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

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Editor-in-Chief
Mahta Moghaddam