NON-CONTACT IC RECORDING MEDIUM SYSTEM, NON-CONTACT IC RECORDING MEDIUM, AND NON-CONTACT IC RECORDING MEDIUM READER

摘要

PPROBLEM TO BE SOLVED: To provide a non-contact IC recording medium system which realize improvement of security and to provide a non-contact IC recording medium and a non-contact IC recording medium reader. PSOLUTION: The non-contact IC recording medium system is provided with a plurality of non-contact IC cards 110 and 120 having digital data recorded, an antenna 131 and a radio communication circuit 133 which simultaneously communicate with the plurality of non-contact IC cards 110 and 120 by a load modulation system and superpose wavelengths of responses simultaneously sent from non-contact IC cards 110 and 120 to receive them as a synthesized waveform, and a reader 130 which has a demodulation circuit 135 for demodulating the synthesized waveform to digital data and reads digital data recorded on the plurality of non-contact IC cards 110 and 120. PCOPYRIGHT: (C)2004,JPO