Patent ID: 7362283

Claim:
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.