IEE Colloquium on Hybrid Antennas

26-26 May 1993

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Displaying Results 1 - 7 of 7
  • An array-fed mesh reflectors for multiple spot beam and reconfigurable shaped beam operation

    Publication Year: 1993, Page(s):7/1 - 7/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (361 KB)

    This paper describes an array-fed form of the reconfigurable mesh reflector antenna which offers a more flexible reconfigurable capability. In addition to the ability to produce a variety of shaped beams by modification of a mesh reflector profile, an alternative mode of operation is offered in which a set of high-gain overlapping spot beams is generated. The essential features of this antenna are... View full abstract»

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  • Reflector shaping in hybrid antennas

    Publication Year: 1993, Page(s):6/1 - 6/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (242 KB)

    The authors consider hybrid antennas in which a large aperture reflector system is illuminated by a small phased array. The entire feed array is driven with a fixed power distribution at all times, allowing the use of a relatively simple and efficient beam forming network. Particular advantages are to be gained by the use of shaped reflector surfaces in place of conventional conic profiles. In gen... View full abstract»

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  • An overview of the ESTEC-AKUBA programme

    Publication Year: 1993, Page(s):5/1 - 5/8
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (335 KB)

    A study over three years for the design and manufacture of an imaging phased array antenna to provide European multiple spot beam coverage has included extensive trade-off activities, and resulted in the choice of a dual shaped imaging system for breadboarding. This paper presents an overview of the ESTEC active Ku band antenna programme. The design and performance of the antenna are presented. Th... View full abstract»

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  • Design and performance of a dual-reflector imaging array antenna

    Publication Year: 1993, Page(s):4/1 - 4/7
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (437 KB)

    A brief discussion of the operating principle of a two-dimensional configuration is detailed. A subreflector shaping technique is described which offers improved antenna aperture efficiency. Various aspects of a three-dimensional antenna are discussed, including analysis techniques, polarisation properties and sidelobe performance.<<ETX>> View full abstract»

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  • Gabor representations for hybrid antenna computations

    Publication Year: 1993, Page(s):3/1 - 3/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (254 KB)

    This paper introduces the use of Gabor transforms to reflector antenna analysis, illustrating the topic with applications to the computation of field problems arising in the design of array-fed single and double reflector systems. The Gabor transform, and its discrete variant the Gabor series, have particularly attractive features since they exploit the localisation inherent in high-frequency fiel... View full abstract»

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  • Semi-active hybrid antennas for satellites

    Publication Year: 1993, Page(s):1/1 - 112
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (459 KB)

    The potential of semi-active multimatrix reflector antennas for mobile and fixed communications is confirmed by investigations on beam scanning by phase-only optimisation at the amplifier input level, and reflector shaping in the interests of smaller hybrid matrices. An application to 20/30 GHz regional VSAT communications is presented, and differences from low-frequency global systems are highlig... View full abstract»

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  • IEE Colloquium on 'Hybrid Antennas' (Digest No.126)

    Publication Year: 1993
    IEEE is not the copyright holder of this material | PDF file iconPDF (49 KB)
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