Patent ID: 8204545

Claim:
An antenna suitable for use in a close-proximity wireless system, the antenna comprising: a substrate comprising a first surface and a second surface; a coupling element configured to allow for transmission of an electromagnetic wave to and/or receipt of an electromagnetic wave from a wireless device in close proximity, wherein the coupling element is disposed proximal the first surface of the substrate and comprises a feed point at a central portion; a ground plane proximal the second surface of the substrate, the ground plane comprising a base portion facing the second surface of the substrate and separated from the second surface of the substrate by a gap, and a protrusion comprising a first portion proximal the second surface of the substrate, comprising a first length in a first direction and a second length in a second direction, the first length being shorter than the second length, and disposed at a central portion in the first direction, and a second portion extending between an edge of the first portion in the first direction and the base portion of the ground plane; and a feed terminal comprising a first edge and a second edge, the first edge disposed within a space formed by the protrusion and extending via a through-hole in the substrate, and the second edge connected to the feed point of the coupling element.