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IEEE Antennas and Propagation Magazine

Issue 4 • Date Aug. 1997

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Displaying Results 1 - 10 of 10
  • Microstrip Antennas, [Book Review]

    Publication Year: 1997, Page(s):76 - 77
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    Freely Available from IEEE
  • Integrated Active Antennas and Spatial Power Combining, [Book Review]

    Publication Year: 1997, Page(s): 77
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    Freely Available from IEEE
  • In Memoriam: Jim Brittingham

    Publication Year: 1997, Page(s): 80
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    Freely Available from IEEE
  • Modern Radio Science, [Book Review]

    Publication Year: 1997, Page(s): 77
    Request permission for commercial reuse | PDF file iconPDF (139 KB)
    Freely Available from IEEE
  • Visualization with OpenGL: 3D made easy

    Publication Year: 1997, Page(s):116 - 120
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (724 KB)

    This article addresses a freely available application programming interface (API) for three-dimensional graphics, known as OpenGL. This API bridges the gap between piles of raw data and extremely complicated three-dimensional animation in a way that requires only a few hours to learn. It is can be used for EM field visualization. In this article, we try to take most of the “leg-work” o... View full abstract»

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  • On the role of fractional calculus in electromagnetic theory

    Publication Year: 1997, Page(s):35 - 46
    Cited by:  Papers (84)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1272 KB)

    We have applied the concept of fractional derivatives/integrals in several specific electromagnetic problems, and have obtained promising results and ideas that demonstrate that these mathematical operators can be interesting and useful tools in electromagnetic theory. We give a brief review of the general principles, definitions, and several features of fractional derivatives/integrals, and then ... View full abstract»

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  • Asymmetrical vertical-dipole antennas for MF AM transmitting revised

    Publication Year: 1997, Page(s):69 - 73
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    A number of comments are included which will provide the reader with new insights about feeding antennas over soil and, generally, feeding antennas against limited ground planes. Trainotti (see ibid., vol.35, p.47-50, 1993, vol.38, p.75-82, 1996, and IEEE Trans. on Broadcasting, vol.37, no.3, p.106-14, 1991) has published a series of interesting papers that show by detailed numerical modeling and ... View full abstract»

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  • Estimating the attenuation due to combined atmospheric effects on modern Earth-space paths

    Publication Year: 1997, Page(s):26 - 34
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (996 KB)

    With the emergence of new satellite-communications systems operating in the Ka band, the role of atmospheric effects on propagation paths has gained increased significance. The impairing factors of rain have always been considered when designing links at above 10 GHz. However, water vapor, clouds, and oxygen, which were previously considered “secondary affects”, are now appearing to pl... View full abstract»

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  • Comparison of three FMM techniques for solving hybrid FE-BI systems

    Publication Year: 1997, Page(s):47 - 60
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    By virtue of its low operation count, the application of the fast multipole method (FMM) results in a substantial speed-up of the boundary-integral (BI) portion of the hybrid finite-element/boundary-integral technique, independent of the shape of the BI contour. Previously, various versions of the fast multipole method have been proposed, each introducing a different approximation to the implement... View full abstract»

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  • Genetic algorithms in engineering electromagnetics

    Publication Year: 1997, Page(s):7 - 21
    Cited by:  Papers (447)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1860 KB)

    This paper presents a tutorial and overview of genetic algorithms for electromagnetic optimization. Genetic-algorithm (GA) optimizers are robust, stochastic search methods modeled on the concepts of natural selection and evolution. The relationship between traditional optimization techniques and the GA is discussed. Step-by-step implementation aspects of the GA are detailed, through an example wit... View full abstract»

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