Patent ID: 7956812

Claim:
A wide-band antenna, comprising: a substrate including a first surface and a second surface, wherein said first and second surfaces are opposite to each other; a first radiator disposed on said first surface; a second radiator disposed on either said first surface or said second surface and spaced apart form said first radiator by a predetermined distance; a grounding portion disposed on said substrate and coupled with said second radiator; wherein the projections of said second radiator and said grounding portion on said first surface define a semi-open region, said first radiator at least partially extends into said semi-open region; and a signal feeding portion including a coupling unit, said coupling unit disposed on said second surface and at least partially overlapping said first radiator; wherein said signal feeding portion couples with said grounding portion and feeds signals to excite said first radiator to form a first band mode through coupling effect by said coupling unit, and said first radiator feeds signals to excite said second radiator to form a second band mode by coupling effect.