Patent ID: 8081120

Claim:
An antenna element comprising: a folded plate-shaped monopole antenna portion having a U-shape in cross section; a first conductive element extending from a first location of said folded plate-shaped monopole antenna portion; and a second conductive element extending from a second location of said folded plate-shaped monopole antenna portion; wherein said folded plate-shaped monopole antenna portion comprises: a first conductive plate having a first length; a second conductive plate which is disposed in parallel with said first conductive plate and which has a second length shorter than the first length; and a coupling plate which couples said first conductive plate with said second conductive plate at a first end portion thereof; wherein said first conductive element extends from said second conductive plate as the first location; wherein said second conductive element extends from said coupling plate as the second location; wherein said first conductive element and said second conductive element are bent so that said antenna element is contained in a space defined by an imaginary rectangular parallelepiped having a predetermined width, a predetermined thickness, and a predetermined height; wherein said first conductive element has a feeding point at a predetermined position of a tip portion thereof; wherein said second conductive element has a tip which is located so as to be apart from the feeding point by an utmost distance in a height direction of the imaginary rectangular parallelepiped.