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Multilevel and space-filling ground-planes for miniature and multiband antennas

  • US 7,362,283 B2
  • Filed: 03/10/2004
  • Issued: 04/22/2008
  • Est. Priority Date: 09/13/2001
  • Status: Active Grant
First Claim
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1. An antenna system comprising:

  • an antenna element; and

    a ground plane comprising;

    at least two conducting surfaces each having a plurality of sides defined by at least one edge;

    at least one conducting strip connecting the at least two conducting surfaces for allowing current to flow between the at least two conducting surfaces;

    the at least one conducting strip being narrower than the width of any of the at least two conducting surfaces;

    the ground plane being disposed in a plane substantially parallel to a plane of the antenna element;

    the ground-plane further comprising at least one of a space-filling-curve shape and a multilevel structure, wherein the multilevel structure includes;

    a set of conducting polygons, the polygons each having the same number of sides;

    the polygons are electromagnetically coupled by means of either a capacitive coupling or ohmic contact; and

    a contact region between directly connected polygons is narrower than half of the perimeter of said polygons in at least seventy-five percent of said polygons defining the conducting ground plane.

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