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Antenna device

  • US 6,836,248 B2
  • Filed: 04/22/2003
  • Issued: 12/28/2004
  • Est. Priority Date: 03/15/2001
  • Status: Expired due to Fees
First Claim
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1. An antenna device comprising:

  • a radiating plate;

    a feeding line provided to one of a side and an end of said radiating plate;

    a grounding plate provided facing said radiating plate; and

    a shorting portion whose one end is disposed near said feeding line and an other end is connected to said grounding plate;

    wherein two resonators including a first resonator and a second resonator are formed on said radiating plate by providing a slit on a side face or an end face of said radiating plate approximately opposing said feeding line, and said antenna device has an wide band frequency range responsive to a coupling level between said two resonators, and wherein a conductive coupling plate is provided near said radiating plate, via an insulating member, across said slit.

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