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Antenna device

  • US 20020105474A1
  • Filed: 11/08/2001
  • Published: 08/08/2002
  • Est. Priority Date: 02/07/2001
  • Status: Active Grant
First Claim
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1. An antenna device comprising:

  • an antenna element;

    a variable capacitor disposed closely to said antenna element and coupled with said antenna element;

    a tuning voltage supply terminal for supplying a tuning voltage to said variable capacitor;

    a resonance circuit including said antenna element and said variable capacitor; and

    a signal power terminal capable of at least one of sending a signal power to said resonance circuit and receiving a signal power from said resonance circuit.

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