ANTENNA DEVICE AND COMMUNICATION DEVICE USING ANTENNA DEVICE

摘要

An antenna device (60) which is used in a recording and/or reproducing device for writing and reading data to/from a non-contact IC card (1), and which has a loop coil (61) that emits an electromagnetic field to magnetically couple with a loop coil (4) on the IC card side and transmits/receives data, the former loop coil being in an asymmetrical shape with distances, facing each other across the center thereof, between adjacent coils differing.