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Conical omni-directional coverage multibeam antenna with parasitic elements

  • US 5,872,547 A
  • Filed: 09/09/1996
  • Issued: 02/16/1999
  • Est. Priority Date: 07/16/1996
  • Status: Expired due to Term
First Claim
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1. An antenna system comprising:

  • a plurality of radiating structures spaced circumferentially around a center point, each radiating structure of said plurality of radiating structures being spaced equidistant from and parallel to a next adjacent radiating structure;

    a plurality of passive structures spaced circumferentially around said center point, each passive structure of said plurality of passive structures being spaced equidistant from and parallel to a next adjacent passive structure;

    a ground surface circumferentially located around said center point and between said center point and each of said radiating structures, said ground surface also being located between said center point and each of passive structures; and

    means for phase shifting a transmission signal from certain activated radiating structures a selected delay amount, the phase shift amount being selected such that the transmission signal wave front leaving said activated radiating structures is in a relatively straight line substantially perpendicular to the direction of travel of said transmission signal, the direction of travel being normal to a point on the ground surface corresponding to one of said activated radiating structures.

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