| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an antenna device which is easily manufactured, can accommodate to two frequencies, enables wider bandwidth and downsizing, and has a stable characteristic. <P>SOLUTION: An antenna device comprising a folded dipole antenna corresponding to two frequencies forming a loop has a first element which makes an arrangement form for a flat surface of a flat element an approximate rectangular form, and a second element which makes an arrangement form for a flat surface of a flat element provided on the same surface as the first element an approximate rectangular form. A pair of connecting conductor wires are provided with a predetermined width conducting the first and the second elements, a pair of feeding points are formed at an approximate middle point of one long side of the approximate rectangular in an antenna element at intervals, a pair of connecting conductor wires are formed on a long side opposite to the pair of feeding points at intervals, and a pair of connecting conductor wires are conducted to an approximate middle point of one long side of the second element parallel to the opposite long side of the first element at intervals. <P>COPYRIGHT: (C)2008,JPO&INPIT |
