Broadside high-directivity microstrip patch antennas

An antenna system comprising:

• a driven antenna element;
• a parasitic antenna element;
• a dielectric support;
• a ground plane layer;
• a first input terminal, the first input terminal being coupled to the driven antenna element;
• a second input terminal, the second input terminal being coupled to the ground plane layer;
• wherein the driven antenna element and the parasitic antenna element are arranged on the dielectric support;
• wherein the parasitic antenna element is coupled to the driven antenna element by means of a gap between the driven antenna element and the parasitic antenna element;
• and
• wherein the gap is defined by a space-filling curve, said space-filling curve being a curve comprising at least ten connected segments, wherein each of said segments forms an angle with its neighbors so that no pair of adjacent segments define a longer straight segment, and wherein any portion of the curve that is periodic along a fixed straight direction of space is defined by a non-periodic curve comprising at least ten connected segments in which no pair of adjacent and connected segments define a longer straight segment.