Patent ID: 8624792

Claim:
An antenna device for transmitting and receiving electromagnetic signals, comprising: a ground plane; a radiator; and a plurality of parasitic elements arranged, on the ground plane, around the radiator in a radially symmetric manner, the parasitic elements being permanently electrically shunted to the ground plane and being arranged such that a beamwidth of the radiation pattern of the antenna device is enlarged, wherein the radiator is a single unitary structural member including a square main radiator portion and a plurality of triangular leg radiator portions extending from the square main radiator portion, and a side of each of the triangular leg radiator portions is connected to the square main radiator portion and extends downward from the square main radiator portion such that a vertex of each of the triangular leg radiator portions is in contact with a feed network arranged on a side of a printed circuit board or the ground plane and the square main radiator portion is arranged at a distance away from the ground plane.