| 摘要 |
An antenna device (101) comprising: an antenna coil (20) comprising a coil conductor (20C) following a plane; and a power supply coil (30) arranged at a position for magnetically coupling to the antenna coil (20). The antenna device (101) also comprises a planar conductor (10). The planar conductor (10) is arranged on the antenna coil (20) side of the power supply coil (30) and, in the planar view, is formed in the vicinity of a first section (21) of the antenna coil (20), extends from the first section (21) of the antenna coil (20) to the outside of the antenna coil (20), and has an area that does not overlap with a coil opening (20A) of the antenna coil (20). The power supply coil (30) is arranged at a position for at least magnetically coupling to a second section (22) being a section other than the first section (21) part of the antenna coil (20). |
