Patent ID: 7528791

Claim:
An antenna comprising: a substrate having a first surface and a second surface; a ground portion disposed on the first surface and having a recessed portion embedded in the ground portion at a depth to form an opening of an edge of the ground portion, wherein the recessed portion is opposite the opening of the edge of the ground portion, and the recessed portion is wider than the opening of the edge of the ground portion; a radiating element disposed on the first surface, electrically connected to the ground portion, and defining a through hole, the radiating element comprising: a first radiating trace including a first segment, a second segment and a first bended portion connecting the first segment and the second segment; and a second radiating trace connected to the second segment; and a feed element disposed on the second surface and electrically connected to the radiating element via the through hole of the radiating element on the substrate, wherein a projection of the feed element on the first surface partially overlaps the recessed portion.