| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device in which the communication characteristics are improved by using a kneaded molding of metal magnetic particles strong against magnetic saturation and a binder as a magnetic shield material, and the metal magnetic particles are prevented from falling off.SOLUTION: An antenna device includes a magnetic shield material 2 produced by kneading and molding metal magnetic powder and a binder, and a spiral coil 1 disposed on one surface of the magnetic shield material 2. The entire surface of the antenna device is covered with cover sheets 3a and 3a. There are two cover sheets 3a and 3a which cover the spiral coil 1 and magnetic shield material 2 completely in tight contact therewith, and are bonded each other on the outside of the magnetic shield material 2. |
