Patent ID: 7518559

Claim:
An inverted L antenna comprising: a printed circuit board (PCB), wherein the PCB is substantially planar along an x-axis and a z-axis, the PCB is provided with a metal layer, a dielectric layer and a ground layer, the PCB has a main body and a tapered edge protrusion, the tapered edge protrusion having a corresponding apex positioned furthest away from the main body, the tapered edge protrusion comprising a portion of the metal layer and a portion of the ground layer, the tapered edge protrusion configured to provide an edge electric field substantially oriented along the z-axis; and an antenna element coupled to the metal layer, wherein the antenna element overlaps the apex and part of the tapered edge protrusion, and a portion of the antenna element extends away from the PCB beyond the apex along the z-axis, such that the antenna element is configured to provide an antenna electric field oriented along the z-axis.