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2009 IEEE Antennas and Propagation Society International Symposium

Date 1-5 June 2009

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Displaying Results 1 - 25 of 956
  • Table of contents

    Publication Year: 2009, Page(s): ii
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  • Author index

    Publication Year: 2009, Page(s):154 - 199
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  • 2009 IEEE AP-S awards and society recognition

    Publication Year: 2009, Page(s):xlv - xlvii
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  • Student paper contest finalists

    Publication Year: 2009
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  • Technical Program Committee

    Publication Year: 2009, Page(s):l - liii
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  • 2009 IEEE International Aymposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting

    Publication Year: 2009, Page(s):iii - xliv
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  • Steering Committee

    Publication Year: 2009, Page(s):xlviii - xlix
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  • Gold-level exhibitors

    Publication Year: 2009, Page(s):liv - lvii
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  • Acknowledgements

    Publication Year: 2009, Page(s): lviii
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  • [Blank page]

    Publication Year: 2009, Page(s): lxii
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  • Technical program

    Publication Year: 2009, Page(s):1 - 153
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  • Notes

    Publication Year: 2009, Page(s):200 - 207
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  • [Front cover]

    Publication Year: 2009, Page(s): c1
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  • Future meeting

    Publication Year: 2009, Page(s): 208
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  • Mitigation of sidelobes using directional modulation

    Publication Year: 2009, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (533 KB) | HTML iconHTML

    A method of mitigating the effects of packaging on secure communications using directional modulation has been demonstrated. While this work used LOS communications, it can be easily generalized to non-line-of-sight channels with multipath. The procedure used to determine the sets of phase shifts for DM is applicable to arbitrarily-spaced arrays using any variety of quadrature amplitude modulation... View full abstract»

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  • Impact of jammers on the CRLB of the SOI estimation

    Publication Year: 2009, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (598 KB) | HTML iconHTML

    Current research on signal estimation based on antenna array mostly focuses on certain signal of interest (SOI), in the presence of jammers, clutters and thermal noise. In reality, jammers play a critical role on the accuracy of the SOI estimation. In order to fundamentally figure out how jammers affect any estimation result, we concentrate our analysis on Cramer-Rao lower bound (CRLB) of the stre... View full abstract»

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  • Adaptive artificial impedance surface conformal antennas

    Publication Year: 2009, Page(s):1 - 4
    Cited by:  Papers (9)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (850 KB) | HTML iconHTML

    Moving platforms, like manned and unmanned aerial vehicles, require adaptable directive antennas for both communication and radar applications. The integration of these antennas into the body of the platform drives significant development time and expense, and in many cases adversely affects the overall vehicle performance by adversely affecting its aerodynamics or weight. Being able to integrate ... View full abstract»

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  • Hamiltonian algorithm: An optimization method and its application to adaptive beamforming for Espar antenna

    Publication Year: 2009, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (685 KB) | HTML iconHTML

    In this paper we investigate HA for optimization with signal possessing. We describe HA, and explain its feature for nonlinear optimization. We employ HA as a tool to solve optimization problem such as an adaptive beamforming for Espar antenna. View full abstract»

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  • Large non-aliasing diversity arrays

    Publication Year: 2009, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB) | HTML iconHTML

    The two-wave spatial squared correlation function is useful for designing large sparse diversity arrays that are alias-free and have both low average and low peak correlations. The largest 12 element example found to satisfy requirements with no grating lobes is a non-uniform Y array of diameter 18lambda. Additional cases can be designed and analyzed using the correlation technique presented above... View full abstract»

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  • Investigation on the combination of a scan/phase antenna diversity system with a novel diversity antenna set

    Publication Year: 2009, Page(s):1 - 4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB) | HTML iconHTML

    The improvement of mobile reception performance for satellite digital audio radio services is investigated, combining a novel scan/phase antenna diversity system with a new diversity antenna set which can be mounted easily underneath one radome on the roof of a car. In combination with the scan/phase antenna diversity system the new diversity antenna set yields an improvement in reception quality ... View full abstract»

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  • A planar parasitic array antenna for tunable radiation pattern

    Publication Year: 2009, Page(s):1 - 4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (545 KB) | HTML iconHTML

    In this paper, a cross-type parasitic array antenna is designed to tune the radiation pattern which attenuates incoming interference and improve packet reception. Using only a 5-element planar array allows full 2-dimensional beam steering. The measurement shows that approximately 30 degrees of beam steering can be achieved by terminating parasitic elements with commercial Si-based varactors allowi... View full abstract»

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  • On the development of a self-recoverable antenna system

    Publication Year: 2009, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB) | HTML iconHTML

    This paper deals with the initial stage of the development of a SRA system, whereas the complete system is meant to incorporate real-time computing, decision making, parameter optimization, and autonomous operation. When complete, the system could have a significant impact on smart communication systems in terms of their versatility and robustness of operation. View full abstract»

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  • The application of 3D deterministic approach to signal estimation in the case that several antenna elements are missing in a uniform 1-D array

    Publication Year: 2009, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (458 KB) | HTML iconHTML

    From the figure above, we can come to conclusion that the 3D deterministic approach is still effective in strength estimation of the SOI in the case that several elements are missing, with a high accuracy. Furthermore, Forward-Backward method performs better than Forward and Backward method. View full abstract»

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  • Adaptive antenna composed of six dipole elements for wireless LAN - Part 2 -

    Publication Year: 2009, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1401 KB) | HTML iconHTML

    In this paper, the adaptive antenna composed of six printed dipole elements loaded with the chip capacitor at the feed point instead of the varactor diode is numerically and experimentally analyzed. The operating frequencies of wireless LAN are from 2.4 GHz to 2.4835 GHz. In the numerical analysis, the electromagnetic simulator "WIPL-D" based on the method of moment is used. View full abstract»

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  • Low-loss compact butler matrix for wireless communications in underground mines

    Publication Year: 2009, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (509 KB) | HTML iconHTML

    A new compact of 4times4 Butler matrix has been proposed. The circuit is compact with 80% of size reduction compared to the conventional structure. In the proposed design, Lange coupler and Lange crossover have been used as a key component to lead with significant size reduction and loss minimization. The design has the advantage of being compact while displaying good results. These features make ... View full abstract»

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