Noncontact communication medium and noncontact communication system

Taking out with a power circuit 62 rectifications with the resonant circuit for outputting 60 communication device of electromagnetic clutch, a control diodes circuit monitoring 61 output voltage of THE; and voltage output END to the first Vth1), a switch element SW switching-on/to separate, welded with the output voltage and THE higher switch element SW state. Holding state of switch element SW matter is welded in the voltage output END of the; and power supply switch element is PSW. An array based on the; the multi-Zhang Fei connected with the IC card 6 states size, and communication, the non-contact IC card 6) is placed on the data communication.