| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna with a high coupling degree of a power feeding coil and a booster antenna and excellent transmission efficiency of RF signals, and with a null point restrained, and an RFID device with the antenna.SOLUTION: A first booster coil 111 is constituted by a first coil pattern 11 and a coil pattern 13, and a second booster coil 112 is constituted by a coil pattern 12 and a coil pattern 14. The second booster coil 112 is arranged adjacent to and connected to the first booster coil 111, and is wound to generate a magnetic field in the same direction as a direction of a magnetic field generated by the first booster coil 111. A power feeding coil 210 is arranged across an adjacent portion of the first booster coil 111 and the second booster coil 112 in a plane view. The power feeding coil 210 is coupled with the first booster coil 111 and the second booster coil 112 via an electromagnetic field. |
