| 摘要 |
PROBLEM TO BE SOLVED: To provide an information processor which can prevent mutual interference between transmission/reception antennas, which can enlarge a communication possible area with an information storage medium and can improve reception sensitivity. SOLUTION: In a radio card reader/writer 200 which is provided with a first transmission antenna 201 and second and third reception antennas 202 and 203 and which transmits/receives data by radio with a radio card 100 through the respective antennas 201, 202 and 203, the respective antennas 201, 202 and 203 are constituted of a rectangular loop antenna. The respective antennas 201, 202 and 203 are provided on a almost the same plane so that the respective sides of the first antenna 201 and the second antenna 202 form the overlapped part of the width (c) and a side of the first antenna 201 opposite to the overlapped part and one side of the third antenna similarly form the overlapped part of the width (c). Reception output is obtained as the sum of the respective outputs of the second and third antennas 202 and 203. |
