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Antenna device

  • US 6,034,640 A
  • Filed: 04/01/1998
  • Issued: 03/07/2000
  • Est. Priority Date: 04/01/1997
  • Status: Expired due to Term
First Claim
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1. An antenna device for use in a personal digital cellular communication apparatus, comprising:

  • an antenna body including a conductor, an equivalent circuit of said conductor comprising an inductive component and a resistive component in a series connection, anda frequency changing circuit including at least a parallel circuit comprising a switching diode and a passive element connected to said conductor of said antenna body.

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