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Tunable slot antenna

  • US 6,028,561 A
  • Filed: 03/06/1998
  • Issued: 02/22/2000
  • Est. Priority Date: 03/10/1997
  • Status: Expired due to Fees
First Claim
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1. A tunable slot antenna comprising:

  • a flat conductive cubic shaped into a rectangular parallelepiped as a whole;

    a slender strip conductor extending along the direction of a resonant axis of a space inside said flat conductive cubic, and placed so as to be isolated from said flat conductive cubic;

    a radio wave transmitting and receiving slot formed in an upper surface of said flat conductive cubic so as to intersect said strip conductor at a position intermediate and spaced from ends of said strip conductor and forming a cross with said strip conductor;

    means for supplying RF power between a connection point set to said strip conductor and a side wall of said flat conductive cubic; and

    a variable capacitor electrically connected between one point, said one point defining a capacitor connecting point, lying in the neighborhood thereof including an end far from the connection point of said strip conductor and the side wall of said flat conductive cubic.

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