COIL ANTENNA AND PORTABLE ELECTRONIC APPARATUS

摘要

Coil units (3A) and (3B) including windings (2A) and (2B), respectively, are disposed on opposite sides across a virtual center line that is perpendicular to a direction of positional displacement of a portable electronic apparatus that is to be brought closer to a reader/writer. The windings (2A) and (2B) are connected in series through a conductor (4) such that winding directions of the windings (1A) and (1B) are the same. A difference in the communication performance between a case where the portable electronic apparatus is brought closer to a central portion of the reader/writer and a case where the portable electronic apparatus is brought closer to a position that is deviated from the central portion of the reader/writer can be reduced. In particular, even in a case where the portable electronic apparatus is brought closer to a peripheral portion of the reader/writer, a predetermined maximum possible communication range can be ensured.