Patent ID: 8779990

Claim:
An antenna comprising: an antenna area which is formed on a corner of a substrate; an antenna conductor which is formed in the antenna area, has a first conductor part and a second conductor part, and is shaped so that the first conductor part and the second conductor part are connected to each other via a bend; a first ground area which is formed next to the antenna area and is connected to an end of the first conductor part; a second ground area which is formed next to the antenna area and is spaced away from an open end in a direction from the bend to the open end of the second conductor part; a feed unit which feeds electricity to the antenna conductor; and a wave director which is formed in the antenna area and is positioned closer to an open front edge of the substrate than the second conductor part of the antenna conductor is, wherein the wave director is in an L shape and is bent at a position closer to the second ground area than the open end of the second conductor part of the antenna conductor, one part of the L shape is arranged opposite to the second conductor part of the antenna conductor, and another part of the L shape is arranged opposite to a border between the antenna area and the second ground area, wherein the second conductor part is designed to have a length approximately λ/4, and wherein an electric current is at a minimum at the open end of the second conductor part.