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IEEE Antennas and Propagation Magazine

Issue 1 • Date Feb. 1998

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Displaying Results 1 - 11 of 11
  • On memoriam: Ralph Kleinman

    Publication Year: 1998, Page(s):57 - 58
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    Freely Available from IEEE
  • Chen-To Tai wins Heinrich Hertz medal

    Publication Year: 1998, Page(s): 100
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    Freely Available from IEEE
  • Reviews and Abstracts

    Publication Year: 1998, Page(s):92 - 94
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    Freely Available from IEEE
  • Report of Awards and Fellow Committee

    Publication Year: 1998, Page(s): 122
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    Freely Available from IEEE
  • Mixed-order tangential vector finite elements for triangular elements

    Publication Year: 1998, Page(s):104 - 108
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    The paper begins by reviewing the principles of edge- and face-based vector basis functions for FEM expansion, using tangential vector finite elements (TVFEs) for triangular elements. A basic description of the hierarchical concept is then given and mixed-order TVFEs are described for triangular elements. After an introduction of the geometry, a presentation of the lowest-order TVFE (of order 0.5)... View full abstract»

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  • On the use of wide-band, high-gain, microstrip antennas for mobile telephones

    Publication Year: 1998, Page(s):88 - 90
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    The increasing use of cellular telephones has spawned considerable research effort on the design of compact, high-efficiency antennas for mobile telephones, exhibiting low EM coupling to the human head. Microstrip antennas seem now to render possible the achievement of all these characteristics. We present some results on a stacked microstrip antenna designed at the University of Utah, comparing i... View full abstract»

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  • Cellular telecommunications: estimating shadowing effects using wedge diffraction

    Publication Year: 1998, Page(s):53 - 58
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    Knife-edge diffraction has been used to estimate the effects of blocking obstacles and terrain for cellular telecommunications. Wedge diffraction is more appropriate in many cases. This paper presents simple formulas that quantify the effects of shadowing caused by rising terrain using wedge diffraction. The shadowing effect is directly related to the typical cellular-telecommunications case, wher... View full abstract»

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  • Polarimetric bistatic-measurement facility for point and distributed targets

    Publication Year: 1998, Page(s):31 - 41
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1340 KB)

    A fully polarimetric bistatic-radar facility has been constructed at the University of Michigan, to serve as a research tool for improved understanding of the nature of bistatic scattering for point and distributed targets. The facility is capable of operation at 10, 35, and 94 GHz, but only the 10-GHz system is described in the presentation. To meet both the size and design constraints both a hor... View full abstract»

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  • The application of characteristic-mode techniques to vehicle-mounted NVIS antennas

    Publication Year: 1998, Page(s):7 - 21, 30
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1928 KB)

    Radio communications over relatively short distances, but beyond line-of-sight, present few problems nowadays, except in certain situations when no suitable, artificial means of relaying the signals exist. A mode of propagation, known as NVIS, or near vertical-incidence skywave, which relies only on the ionosphere, provides a solution. However, to exploit it requires careful choice of operating fr... View full abstract»

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  • Model-based parameter estimation in electromagnetics. I. Background and theoretical development

    Publication Year: 1998, Page(s):42 - 52
    Cited by:  Papers (92)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1260 KB)

    This article first provides a background and motivation for using model based parameter estimation (MBPE) in electromagnetics, focusing on the use of fitting models that are described by exponential and pole series. How data obtained from various kinds of sampling procedures can be used to quantify such models, i.e., to determine numerical values for their coefficients is also presented. The paper... View full abstract»

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  • A basic theorem that simplifies the analysis of wire antennas

    Publication Year: 1998, Page(s):22 - 30
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    The basic concept of the differential current element is extended to obtain an equally basic but more easily applied concept with which to characterize antenna behavior. The extension is accomplished by applying mathematical induction, using only algebra and a few well-known trigonometric identities View full abstract»

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