IEEE Antennas and Propagation Magazine

Volume 35 Issue 5 • Oct. 1993

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Displaying Results 1 - 6 of 6
  • Micromachined circuits for millimeter- and sub-millimeter-wave applications

    Publication Year: 1993, Page(s):9 - 17
    Cited by:  Papers (41)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (940 KB)

    Two approaches for the development of micromachined circuits for millimeter- and submillimeter-wave applications are discussed. These technologies provide a means to overcome the drawbacks typically associated with conventional planar transmission lines, such as microstrip and coplanar waveguides. Examples demonstrating the use of micromachining to effectively incorporate a third dimension into th... View full abstract»

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  • Multibeam-operational mode at the RATAN-600 radio telescope

    Publication Year: 1993, Page(s):18 - 27
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (923 KB)

    The main requirements for the feed array designed for the RATAN-600 radio telescope, which are intended to improve observational possibilities, are presented. The experimental eight-element feed-array assembly and its measured characteristics are described. The first antenna measurements, made in the AC operational mode, shown that the combination of the reflector with the feed array may increase ... View full abstract»

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  • The effects of multipath on the measurement of antenna time delays

    Publication Year: 1993, Page(s):28 - 36
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (921 KB)

    An analytical expression is presented for calculating the effects of multipath on group delay. The expression was experimentally verified by the tests made at the Telecommunications Development Laboratory of the Jet Propulsion Laboratory using the Mariner Venus/Mercury 1973 radio frequency subsystem, block 3 receiver, and the Mu 1 ranging machine. The motivation for the research is explained, and ... View full abstract»

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  • Putting the human being back into engineering (education)

    Publication Year: 1993, Page(s):37 - 42
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (583 KB)

    The author suggests that the main crisis facing engineering education and the engineering industry is a crisis of professionalism. He outlines four principles of professionalism, discusses the goal of education, and examines excellence in industry.<> View full abstract»

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  • Directivity of omnidirectional antennas

    Publication Year: 1993, Page(s):50 - 51
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    A graph describing the directivity of an omnidirectional antenna versus the half-power elevation-plane beamwidth is presented. This data has been calculated assuming a sin/sup n/ theta elevation-plane pattern. A closed-form curve-fitted approximation for this relationship is also presented.<> View full abstract»

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  • EM Programmer's Notebook [EM scattering]

    Publication Year: 1993, Page(s):68 - 70
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    An interactive circular-cylinder modeler software program in which the approximation of a complex scatterer is achieved by using circular cylinders is described. The cylinders are made of either homogeneous isotropic dielectric material, perfectly conducting material characterized by a surface impedance, or a combination of the two. The user interface is designed for quick construction of two-dime... View full abstract»

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