Patent ID: 7183981

Claim:
A monopole antenna, comprising: a base board having a first planar surface and a second planar surface opposite to said first planar surface; a first substantially L-shaped conductor formed on said first planar surface, wherein said first substantially L-shaped conductor is composed of a first main radiating strip and a first extension radiating strip connecting to said first main radiating strip; a first ground plane formed on said first planar surface, wherein said first main radiating strip and said first ground plane are parallel to and spaced from each other by a predetermined distance; a second substantially L-shaped conductor formed on said second planar surface, wherein said second substantially L-shaped conductor is composed of a second main radiating strip and a second extension radiating strip connecting to said second main radiating strip; and a second ground plane formed on said second planar surface, wherein said second main radiating strip and said second ground plane are parallel to and spaced from each other by said predetermined distance.