| 发明名称 | Coil antenna and communication terminal device | ||
| 摘要 | To ensure a sufficient communication distance and to concurrently suppress a conductor loss, a coil antenna includes a magnetic core including a first peripheral surface including at least a first principal surface, a first coil conductor located on the first principal surface and wound around a predetermined winding axis, a first base material layer stacked on the first principal surface, including at least a first surface parallel or substantially parallel to the first principal surface, and made of a material having a lower magnetic permeability than the magnetic core, and a second coil conductor located on at least the first surface. Opposite ends of the second coil conductor are coupled to the first coil conductor on the first principal surface, and a direction in which a current flows through the first coil conductor on the first principal surface is substantially the same as a direction in which a current flows through the second coil conductor on the first surface. | ||
| 申请公布号 | US9214728(B2) | 申请公布日期 | 2015.12.15 |
| 申请号 | US201414221356 | 申请日期 | 2014.03.21 |
| 申请人 | Murata Manufacturing Co., Ltd. | 发明人 | Tsubaki Nobuhito;Noma Takashi;Kato Noboru |
| 分类号 | H01Q7/08;H01Q7/06;H01Q19/00;H01Q1/24 | 主分类号 | H01Q7/08 |
| 代理机构 | Keating Beating, LLP | 代理人 | Keating Beating, LLP |
| 主权项 | 1. A coil antenna comprising: a magnetic core including a peripheral surface including at least a first principal surface; a first coil conductor located on the first principal surface and wound around a predetermined winding axis; a first base material layer stacked on the first principal surface, including at least a first surface parallel or substantially parallel to the first principal surface, and made of a material having a lower magnetic permeability than the magnetic core; and a second coil conductor located on at least the first surface; wherein opposite ends of the second coil conductor are coupled to the first coil conductor on the first principal surface; a direction in which a current flows through the first coil conductor on the first principal surface is the same or substantially the same as a direction in which a current flows through the second coil conductor on the first surface; the magnetic core is made of a magnetic material having a relatively high magnetic permeability that is higher than the magnetic permeability of the material of the first base material layer; and each of the opposite ends of the second coil conductor is in direct contact with the first coil conductor. | ||
| 地址 | Kyoto JP | ||