Patent ID: 7683840

Claim:
An antenna device comprising: a ground plate; a feeding wire including a positive signal wire and a negative signal wire electrically connected with the ground plate; a first metal radiator including a radiating arm and a feeding metal sheet, the radiating arm provided on one side of the ground plate and horizontally suspending above the ground plate, the feeding metal sheet vertically arranged with respect to the ground plate with one end thereof being vertically connected to the radiating arm and the other end thereof connected with the positive signal wire of the feeding wire and the ground plate; a second metal radiator horizontally suspending above the ground plate including a first end and a second end, the first end being adjacent to the radiating arm with a clearance formed therebetween, the second end extending away from the radiating arm of the first metal radiator; a ground metal radiator vertically arranged with respect to the ground plate with one end thereof connected with the ground plate and the other end thereof connected with the second end of the second metal radiator; and a parasitic metal radiator horizontally suspending above the ground plate, one end thereof connected with the ground metal radiator and the other end thereof extending away from the ground metal radiator; wherein the first metal radiator has a side wing and is substantially of an L-shape; wherein the radiating arm of the first metal radiator and the first end of the second metal radiator are not on the same level, and the first end of the second metal radiator is farther away from the ground plate than the radiating arm of the first metal radiator; wherein the parasitic metal radiator and the second metal radiator form an obtuse angle therebetween; wherein the parasitic metal radiator has a side wing and is substantially of an L-shape; wherein the first end of the second metal radiator is less than the second end of the second metal radiator; wherein a first end and a second end of the radiating arm are extended horizontally on different levels; wherein the ground metal radiator comprises a first ground metal radiator and a second ground metal radiator and having a clearance therebetween and one end of the first and the second ground metal radiators is vertically connected to the ground plate, the other end of the second ground metal radiator connected with the parasitic metal radiator and the other end of the first ground metal radiator connected with the second end of the second metal radiator respectively; wherein the parasitic metal radiator and the ground metal radiator constitute a parasitic antenna device which produces a second high frequency mode, and the second high frequency mode as well as the first high frequency mode constitute a wide band mode; a length of areas of the second metal radiator and the parasitic metal radiator is ten times larger than that of widths of the second metal radiator and the parasitic metal radiator.