Patent ID: 8077097

Claim:
A dual-band antenna, comprising: a feed portion operable to feed electromagnetic signals; a ground portion; a radiating portion, comprising: a first radiator being elongated, wherein a first end of the first radiator is electrically connected to the ground portion, and a second end of the first radiator is floating; a second radiator with two arms forming a U shape, wherein ends of the second radiator are floating; and a connecting portion connected to the first radiator, the second radiator, and the feed portion, wherein the feed portion feeds electromagnetic signals to the first radiator and the second radiator via the connecting portion; and a fine-tuning portion arranged around the second radiator, operable to control operating frequency bands of the second radiator; wherein the ground portion, the first radiator, and the connecting portion are on a first plane, the second radiator is formed by bending a rectangular-shaped portion into a second plane, and the second plane is substantially perpendicular to the first plane.