| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna device which is easily manufactured with ease, copes with two frequencies, is broadband and downsized, and has stable characteristics. <P>SOLUTION: The antenna device comprising a folded dipole antenna forming a loop which is compliant with two frequencies, is integrally provided with: a first element in which an arrangement configuration of a flat element to a plane is approximately rectangular; a second element placed parallel to the first element, in which an arrangement configuration to the flat element is approximately rectangular; and rising wires making the first and the second elements conductive in which the first element is provided with feeding points on an approximately central part of one long side of the approximately rectangular shape with a certain space from each other. The rising wires are formed on an opposite long side to the feeding points with a certain space from each other, each of the rising wires is placed with a certain space in an approximately central part of one long side of the second element parallel to the opposing long side of the first element, and the flat element, the feeding points or a pair of auxiliary antennas made conductive by the rising wires, are symmetrically located on the feeding points. <P>COPYRIGHT: (C)2008,JPO&INPIT |
