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Miniature antenna

  • US 5,017,932 A
  • Filed: 10/27/1989
  • Issued: 05/21/1991
  • Est. Priority Date: 11/04/1988
  • Status: Expired due to Term
First Claim
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1. A miniature antenna, comprising:

  • a pair of square conductor plates disposed in parallel with a spacing sufficiently smaller than a wavelength used and fixed to each other to an insulating frame to form an antenna structure which is used also as a case;

    feed terminal means provided at a a pair of opposed positions on one of opposed sides of the conductor plates;

    short-circuit elements, provided at a plurality of positions on other opposed sides of the conductor plates to short-circuit in high frequency-wise;

    a gravity-direction sensor disposed in the case to produce an output in accordance with the direction of gravity with respect to a plane along any of the conductor platesto selectively short circuit said short-circuit elements by the output of the gravity-direction sensor so that a plane of polarization established by a seated state antenna is brought into agreement with the direction of gravity.

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