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Antenna system and method

  • US 5,818,385 A
  • Filed: 08/12/1996
  • Issued: 10/06/1998
  • Est. Priority Date: 06/10/1994
  • Status: Expired due to Term
First Claim
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1. A communication system equipped with an array antenna for dynamically controlling radiation patterns, the communication system comprising:

  • an array antenna having means for processing a radio frequency signal, said means for processing a radio frequency signal having a control input and radio frequency signal terminals, the array antenna being located at an antenna site;

    an array antenna control system, the array antenna control system having a processor, an alpha input/output port, a chi input/output port, memory, and a databus;

    the processor, the alpha input/output port, the chi input/output port, and the memory coupled to the databus, the alpha input/output port coupled to said control input; and

    a mobile radio unit having a transmitter;

    a location-determining receiver collocated with the mobile radio unit at a geographic mobile location, the location-determining receiver electromagnetically providing external input data to the chi input/output port regarding the geographic mobile location; and

    a location database containing a library of radiation patterns producible by said array antenna, the location database being stored in said array antenna control system, the radiation patterns defined in terms of radiation pattern gain versus direction, each of said radiation patterns having at least one main lobe approaching a peak pattern gain in a main lobe direction, the array antenna control system selecting a radiation pattern from the library such that the main lobe direction is substantially directed toward the geographic mobile location, the array antenna control system selecting the most focused radiation pattern, from the library, with a greatest radiation pattern gain aligned toward the geographic mobile location.

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