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Antenna Technology (iWAT), 2011 International Workshop on

Date 7-9 March 2011

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Displaying Results 1 - 25 of 123
  • [Front cover]

    Publication Year: 2011, Page(s): c1
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  • Table of contents

    Publication Year: 2011, Page(s): 1
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  • General co-chairs

    Publication Year: 2011, Page(s): 1
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  • Technical Program Committee chair message

    Publication Year: 2011, Page(s): 2
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  • Sponsors and exhibitors

    Publication Year: 2011, Page(s):3 - 5
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  • About iWAT

    Publication Year: 2011, Page(s): 6
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  • Keynote speakers

    Publication Year: 2011, Page(s):14 - 20
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  • Student poster paper contest

    Publication Year: 2011, Page(s):21 - 23
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  • International advisory committee

    Publication Year: 2011, Page(s): 24
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  • Organizing committee

    Publication Year: 2011, Page(s): 28
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  • Wideband curl antenna

    Publication Year: 2011, Page(s):110 - 111
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (71 KB) | HTML iconHTML

    A conventional curl antenna is modified into a staircase curl antenna to realize a wideband axial ratio characteristic. It is found that the staircase curl has a dramatically wide bandwidth of approximately 50% for a 3 dB axial ratio criterion. It is also found that the VSWR exhibits values of less than 2 within this axial ratio bandwidth. View full abstract»

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  • Antenna technologies from 435 MHz to 356 GHz for ESA's candidate Earth Explorer satellite missions

    Publication Year: 2011, Page(s):112 - 115
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (309 KB) | HTML iconHTML

    As a result of down-selection after Phase 0 for the 7th Earth Explorer mission following the User Consultation Meeting held in Lisbon, Portugal in Jan 2009, three candidate missions were selected for further feasibility investigations (Phase A). Each of the candidate missions is now being defined in detail through two parallel and competing industrial system studies and supporting compl... View full abstract»

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  • Electromagnetic macromodels and Maxwellian circuits

    Publication Year: 2011, Page(s):116 - 119
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1131 KB) | HTML iconHTML

    Discrete approximations and numerical solution of Maxwell's curl equations provide a foundation for the development of a variety of macro-models of electromagnetic passive devices, components, and sub-systems. In their majority, such macro-modeling is aimed at containing the cost of numerical computation by offering compact, computationally efficient models as alternatives to the computationally m... View full abstract»

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  • Time-domain finite element analysis of electromagnetic radiation and scattering and microwave circuits

    Publication Year: 2011, Page(s):120 - 123
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (71 KB) | HTML iconHTML

    In 1987, Cangellaris, Lin, and Mei proposed the time-domain finite element method as a promising numerical approach to simulating electromagnetic radiation and scattering phenomena. In this paper, we provide a brief overview of the recent progress in the development of the time-domain finite element method at the University of Illinois. View full abstract»

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  • Multilevel sparse approximate inverse preconditioning for solving dynamic integral equation by H-matrix method

    Publication Year: 2011, Page(s):124 - 127
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (162 KB) | HTML iconHTML

    A novel sparse approximate inverse (SAI) preconditioner in multilevel fashion is proposed to accelerate the convergence rate of Krylov iterations for solving 3D electromagnetic scattering by integral equation. This multilevel formatted preconditioning is derived from the hierarchical data structure of hierarchical (H-) matrix, which overcomes the construction restrict of conventional SAI precondit... View full abstract»

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  • UWB antenna array

    Publication Year: 2011, Page(s):164 - 167
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB) | HTML iconHTML

    This paper compares the performances of ultra wideband (UWB) arrays that use sinusoidal waveform for power pattern and ultra-short pulse waveform for energy pattern. In general, antenna arrays cannot have element spacing larger than one wavelength in any plane because the resulting grating lobes absorb much power, which will limit the bandwidth of antenna arrays. In particular, there are substanti... View full abstract»

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  • Design of high performance sleeve dipole array antenna

    Publication Year: 2011, Page(s):168 - 171
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (198 KB) | HTML iconHTML

    A 5-element planar dipole array antenna is analyzed and successfully implemented. The proposed antenna is designed for operation at 1.9 GHz band for basic station applications with S11<; -14 dB. The planar dipole array antenna comprises of a 1×5 dipole array and fed by a microstrip line. This structure is easily constructed by printing on both sides of a dielectric (FR4) subst... View full abstract»

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  • Time-domain pulse-matched synthesis of ultra-wide band antennas

    Publication Year: 2011, Page(s):172 - 175
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (83 KB) | HTML iconHTML

    Antenna synthesis can yield optimal radiating structures in terms of pattern diagram, gain, bandwidth or other figures of merit. Although the synthesis might be more difficult for continuous sources than for antenna arrays the resulting radiating structures are cheaper and easy to manufacture. In this paper, we propose a time-domain synthesis approach for ultra-wide band antennas. The method is ba... View full abstract»

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  • Enhanced gain UWB slot antenna with multilayer Frequency-Selective Surface reflector

    Publication Year: 2011, Page(s):176 - 179
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (242 KB) | HTML iconHTML

    Adequately design Frequency Selective Surfaces (FSSs) allow significant control of the phase of reflection and transmission characteristics over a wide frequency band. This property is used here to develop a multilayer FSS reflector enhancing the gain and radiation properties of antennas for ultra wideband applications. These kinds of reflectors make structures low profile by providing the flexibi... View full abstract»

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  • Micro-antenna design for intra-cortical proximity communication

    Publication Year: 2011, Page(s):180 - 183
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB) | HTML iconHTML

    This paper discusses the antenna design considerations for intra-cortical proximity communication. The performances of microstrip patch and monopole antenna systems at 60 GHz have been compared. The monopole antenna system can potentially bring down the power required for brain-machine interface technology to micro-watt level. The receiving power can be significantly improved and meet the sensitiv... View full abstract»

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  • Miniaturized zeroth order resonance antenna over a reactive impedance surface

    Publication Year: 2011, Page(s):58 - 61
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (545 KB) | HTML iconHTML

    A miniaturized zeroth order resonance (ZOR) antenna designed on a reactive impedance surface (RIS) is proposed and presented. It is essentially a composite right/left-handed (CRLH) structure which enables the miniaturization by pushing down the left-handed (LH) region. This is achieved by increasing the LH inductor using a shorted meander line. The RIS consists of two-dimensional periodic printed ... View full abstract»

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  • Accurate analysis method for probe-fed cavity-backed patch array element

    Publication Year: 2011, Page(s):62 - 65
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (99 KB) | HTML iconHTML

    An efficient modal method for the analysis and design of an array of probe-fed, cavity-backed patches with parasitic elements is presented. The probe feed can either be straight, stepped or L-shaped. The method described is very accurate resulting in a reliable design that works to the desired specifications the first time without any need for tuning, modification or successive iterations. View full abstract»

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  • Parallel higher-order FE-BI-MLFMA for 3D scattering

    Publication Year: 2011, Page(s):66 - 69
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (286 KB) | HTML iconHTML

    The finite element-boundary integral-multilevel fast multipole algorithm (FE-BI-MLFMA) has shown to be very general and powerful for 3D scattering. This paper reports our major progress of FE-BI-MLFMA made over the past years. First, we report the study on different approaches of choosing surface in FE-BI-MLFMA. Second, we present the comparison of different algorithms of FE-BI-MLFMA. Third, we co... View full abstract»

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  • Application of the theory of Maxwellian Circuits to circular loop scatterers

    Publication Year: 2011, Page(s):128 - 131
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (79 KB) | HTML iconHTML

    The conventional investigation on circular loop scatterer involves fairly complicated mathematical or numerical analyses. The formulation based on the theory of Maxwellian Circuits (MC) of circular loop is quite simple-it is a wave equation with constant complex parameters, which can even be solved analytically. The currents computed by MC are in excellent agreement with those computed by MoM. Ana... View full abstract»

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  • A circularly polarized planar and slender antenna using helical element and back conductor

    Publication Year: 2011, Page(s):132 - 135
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (242 KB) | HTML iconHTML

    A circularly polarized slender shaped helical antenna is presented. The helical antenna can generate circular polarization (CP) in the normal direction to the helical axias under a condition of structural parameters. However, when a planar and slender antenna shape is required, it may be difficult to satisfy the condition. In the proposed antenna, the ratio of the thickness : vertical : horizontal... View full abstract»

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