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Antenna, and manufacturing method therefor

  • US 6,452,569 B1
  • Filed: 05/31/2001
  • Issued: 09/17/2002
  • Est. Priority Date: 03/29/2001
  • Status: Expired due to Fees
First Claim
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1. An antenna, comprising:

  • a spiral primary coil having certain pitches; and

    a spiral secondary coil disposed outside the primary coil and having pitches larger than those of the primary coil, the secondary coil having one end connected to one end of the primary coil, extending toward the other end of the primary coil, and ending at the other end of the secondary coil which is adapted to be a feeding point so that the entire primary and secondary coils are effective for operation in a frequency band, and the secondary coil is effective for operation in another, different frequency band.

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