Patent ID: 8018391

Claim:
An antenna, comprising: a plate-shaped radiating element, formed by bending a metal plate having a substantially rectangular shape so as to have a shape having at least three planes each extending in a first direction between a first edge of the plate-shaped radiating element and a second edge of the plate-shaped radiating element, the plate-shaped radiating element having a third edge and a fourth edge in a second direction perpendicular to the first direction; a first slit, provided in the first direction between a portion in the vicinity of the first edge and a portion in the vicinity of the second edge through a center point of the plate-shaped radiating element, and forming plate-shaped dipole elements on both sides of the first slit; a second slit, provided in the second direction, and forming a first folded element on a side of the first edge; a third slit, provided in the second direction, and forming a second folded element on a side of the second edge; and feeding points, provided on both sides of the first slit, wherein the plate-shaped dipole elements are greater than the first and second folded elements in width in the first direction.