Patent ID: 7589692

Claim:
A planar inverted F antenna having a radiation patch, comprising: a first radiation patch for radiating a signal, comprising: a first edge; a second edge parallel to the first edge and having a length smaller than a length of the first edge; a third edge adjacent to the first edge and connecting the first edge and the second edge at a first point and a second point, respectively; a fourth edge adjacent to the first edge and parallel to the third edge, said fourth edge connecting the first edge at a third point, and a linearly tapered corrugated fifth edge connecting the fourth edge and the second edge at fourth and fifth points, respectively, wherein said fourth point is located away from the third point and on the fourth edge and said fifth point being located away from the second point on the second edge; a ground plate for grounding the first radiation patch; a feeding line for supplying an electric power to the first radiation patch; a shorting plate having a length disposed between the first radiation patch and the ground plate; a second radiation patch coupled to at least one of the edges of the first radiation patch and disposed between the first radiation patch and the ground plate, wherein said first radiation patch is disposed in a plane parallel to the ground plate; wherein said fifth edge comprises a plurality of corrugated hollows each extending from a straight line connecting said fourth and fifth points toward said third edge.