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Communication system, a primary radio station, a secondary radio station, and a communication method

  • US 6,195,559 B1
  • Filed: 11/19/1998
  • Issued: 02/27/2001
  • Est. Priority Date: 11/26/1997
  • Status: Expired due to Fees
First Claim
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1. A communication system comprising a primary radio station and a portable radio station, said portable radio station being freely three-dimensionally orientable with respect to a fixed coordinate system, said primary radio station being configured to communicate with said portable radio station, said portable radio station comprising:

  • a transceiver;

    a controllable antenna structure coupled to said transceiver;

    a three-dimensional geometric sensor for three-dimensionally sensing a local magnetic field;

    a beam directional controller, said beam directional controller being coupled to said controllable antenna structure, and said beam directional controller being configured to three-dimensionally control with respect to a main axis of said portable radio station of a beam radiated by said controllable antenna structure on the basis of said sensed local magnetic field, such that, after an initial adjustment of said beam of said controllable antenna structure to a predetermined three-dimensional direction with respect to said main axis, said controllable antenna substantially retains said beam directed into said predetermined three-dimensional direction, irrespective of a subsequent orientation of said portable radio station with respect to said fixed coordinate system.

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