| 摘要 |
In an antenna device 10 including a line-shaped or belt-shaped first conductor 11 having an electrically half length of a wave-length of a first resonant frequency, a feed point 12 to which an end of the first conductor is connected, a plate-shaped second conductor 13 on which the feed point is located and on which another end of the first conductor is grounded, an impedance element 14 is loaded halfway on the first conductor and which varies the first resonant frequency, a second resonant frequency, or both the first resonant frequency and the second resonant frequency. Accordingly, a compact antenna device 10 can therefore be constituted so that an impedance matching between the first conductor 11 and the feed point 12 may be readily obtained. In addition, the antenna device 10 can be commonly used with respect to a multi-frequency operation.
|
