| 摘要 |
PROBLEM TO BE SOLVED: To reduce the strength of electromagnetic field caused by the antenna of a reader/writer away from a device. SOLUTION: Concerning a reader/writer 1 for transmitting power to an IC card 2 with no contact and transmitting/receiving communication with the IC card 2 with no contact, this device is provided with plural antennas 31 arranged in the shape of array for transmitting power to the IC card 2, a card detecting means 32 for detecting the information of locating the IC card 2 near on the plural antennas 31 and a means 33 for selecting any antenna for transmitting power to the IC card 2 based on the position information of the IC card 2 detected by the card detecting means 32. By transmitting power from the antenna near the IC card 2 to the IC card 2, the strength of electromagnetic field away from the device is reduced and the communication area of wide range is provided. |
