Multi-band planar antenna

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.