RADIO COMMUNICATION IMPROVEMENT SHEET BODY, RADIO IC TAG, ANTENNA, AND RADIO COMMUNICATION SYSTEM USING THEM

摘要

PROBLEM TO BE SOLVED: To provide a radio communication improvement sheet body, radio IC tag, antenna, and radio communication system using them which are capable of improving a communicable distance of an IC tag for radio communication.SOLUTION: A first spacer 32 has an allocation face allocating a radio IC tag without wire connection. An auxiliary antenna 35 resonating with an electromagnetic wave used for radio communication is installed on a face on the side opposite to the allocation face of the first spacer 32. The auxiliary antenna 35 is composed of a first conductor layer 27 which is a resonance layer, and a second spacer 33. The second spacer 33 is installed on the side opposite to the first spacer 32 across the first conductor layer 27. A discontinuous region is provided in the first conductor layer 27 of the auxiliary antenna. Thereby, a large communication distance can be ensured by not only excluding influence of a communication jamming body but also making reception power of the radio IC tag (antenna) increase.