| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna device which has further reduced size and widened band. <P>SOLUTION: In the antenna device in which a box-shaped antenna element 102 and a folded monopole element 107 are connected together, the antenna device is grounded via a ground terminal 103 at one of the vertices of the box-shaped antenna element 102 and is connected to a feed section 106 on a substrate 101 via a feed terminal 105 at the vertex forming the same long side together with the grounding vertex. Furthermore, a length from a ground point 104 of the box-shaped antenna element 102 to a distal end of the monopole element 107 is set to a 1/4 wavelength of a first resonant frequency and a length from the feed section 106 to the distal end of the monopole element 107 is set to a 1/4 wavelength of a second resonant frequency. <P>COPYRIGHT: (C)2010,JPO&INPIT |
