Patent ID: 8094084

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 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 a second direction perpendicular to the first 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; a fourth slit, provided in a second direction between the third edge and a portion in the vicinity of the center point; a fifth slit, provided in the second direction between the fourth edge and a portion in the vicinity of the center point; and feeding points, provided between the first slit and the fourth slit, and between the first slit and the fifth slit, wherein the fourth slit and the fifth slit divide the dipole elements into first dipole elements and second dipole elements, and wherein the first and second dipole elements are greater in width in the first direction than the first and second folded elements.