| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna device which receives and transmits radio waves at two frequency bands without increasing installation space. <P>SOLUTION: An antenna device (10) comprises: first loop shaped antenna elements (141 and 142), which receive and transmit a radio wave at a first frequency band; and a second loop shaped antenna element (143) which receives and transmits a radio waves at a second frequency band that is higher than the first frequency band. In the antenna device (10), the second loop shaped antenna element (143) is located in the interior of the first loop shaped antenna elements (141 and 142). <P>COPYRIGHT: (C)2012,JPO&INPIT |
