Reader and/or writer apparatus, power feeding system, and communication system

摘要

A reader and/or writer apparatus, a power feeding system and a power feeding and communication transmission and/or reception system in a proximate wireless card system arranged so that power which satisfies the requirement of the Radio Law (500 mu V/m at a distance of 3 m from the reader and/or writer apparatus) regarding the radiated electric field is supplied sufficiently from the reader and/or writer apparatus to the proximate wireless card (IC card). The reader and/or writer apparatus (1) has a spirally shaped or coil-shaped antenna (101b) for generating electromagnetic fields both to supply operational power to an IC card (2) and to perform transmission and/or reception of signals for communication to and/or from the IC card (2) and a conductor member (101c) for forming a mirror image of the antenna on its back side.