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Multi-band planar antenna

  • US 6,603,429 B1
  • Filed: 02/21/2002
  • Issued: 08/05/2003
  • Est. Priority Date: 02/21/2002
  • Status: Expired due to Term
First Claim
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1. A multi-band planar antenna, comprising:

  • a flat dielectric substrate having a first surface, a second surface that is generally parallel to said first surface, a first edge, and a second edge which is located generally opposite said first edge;

    a first triangular-shaped metal radiating element on said first surface, said radiating element having a triangle apex which is formed by the intersection of two linear triangle sides, and said radiating element having a linear triangle base at whose opposite ends said triangle base being located generally adjacent to said first edge;

    a metal feed line including and formed as an extension of said triangle apex, said feed line extending in a direction away from said triangle base and extending from said triangle apex toward said second edge of said substrate;

    a metal ground plane element on said second surface, said ground plane element having a first edge located generally adjacent to said second edge of said substrate; and

    said ground plane element having a second edge that dimensionally overlaps said feed line and only said apex of said radiating element;

    said ground plane element being electrically connected to said radiating element;

    said radiating element having at least one opening formed therein, thereby providing a multiplicity of current paths which give rise to the multi-banding characteristics of the antenna.

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