Patent ID: 7145510

Claim:
A microstrip antenna having a slot structure, said microstrip antenna comprising: a base board having a first surface and a second surface, wherein said first surface is parallel to said second surface; and a microstrip patch radiator formed on said first surface of said base board, said microstrip patch radiator having a first side and a second side, wherein said first side is parallel to said second side, said microstrip patch radiator having said slot structure exposing a portion of said base board, said slot structure having: an L-shaped slot, wherein one end of said L-shaped slot is vertically connected to a first position of said first side, and said first position is located between the middle point of said first side and one end of said microstrip patch radiator, the opening direction of said L-shaped slot facing said one end of said microstrip patch radiator; a first extending slot connected to the other end of said L-shaped slot, wherein said first extending slot is located within the opening direction of said L-shaped slot; an inverted reversed-L-shaped slot, wherein one end of said inverted reversed-L-shaped slot is vertically connected to a second position of said second side, and said second position is located between the middle point of said second side and the other end of said microstrip patch radiator, the opening direction of said inverted reversed-L-shaped slot facing the other end of said microstrip patch radiator; and a second extending slot connected to the other end of said inverted reversed-L-shaped slot, wherein said second extending slot is located within the opening direction of said inverted reversed-L-shaped slot.