| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna device configured to perform stable communication even though the size of an antenna is reduced relative to an antenna on the communication partner side and the two communicating antennas are coaxially placed close to each other. <P>SOLUTION: An antenna device includes a conductor layer 2 having a conductor opening CA and a slit part SL connecting the conductor opening CA with an outer periphery. A magnetic substance sheet 39 is provided so that an opening CW of a coil conductor 31 is overlapped with the opening CA of the conductor layer 2 when the coil conductor 31 is viewed in planar view, an area of the conductor layer 2 is larger than an area of a formation region of the coil conductor 31, and the opening CW of the coil conductor 31 and the opening CA of the conductor layer 2 are covered with the magnetic substance sheet 39. <P>COPYRIGHT: (C)2012,JPO&INPIT |
