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Wireless LAN antenna with single loop

  • US 6,252,561 B1
  • Filed: 08/02/1999
  • Issued: 06/26/2001
  • Est. Priority Date: 08/02/1999
  • Status: Expired due to Term
First Claim
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1. An antenna comprising:

  • a dielectric substrate having a front surface side and a back surface side;

    a rectangular closed-loop element laid out on said front surface side of said dielectric substrate;

    a layer of rectangular grounding element formed on said front surface side of said dielectric substrate and circumscribed by said rectangular closed-loop element, said layer of rectangular grounding element having a vertical rectangular protrusion portion at the bottom center thereof and across said rectangular closed-loop element;

    a signal feeding line having one end connected to a top portion of said layer of rectangular grounding element and the other end connected to a bottom portion of said vertical rectangular protrusion portion; and

    a layer of copper foil plated on said back surface side of said dielectric substrate and covering a left/right half portion of said front surface side of said dielectric substrate for generating phase differences between currents from two half portions of said rectangular closed-loop element.

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