TAG DEVICE, ANTENNA AND PORTABLE CARD

摘要

To perform high quality wireless communication in which radio wave radiation/reception characteristics do not deteriorate even in the vicinity of a human body and communication of other IC tags is not impeded. A main loop section (11) is a metal foil of elongated loop-shape having an area smaller than the area of a dielectric substrate (30), and mounted to contain the dielectric substrate (30) while covering the surface and side face thereof in the horizontal direction relative to the surface of the dielectric substrate (30) in order to transmit/receive a radio wave. A capacitive load section (12) is a metal foil provided, respectively, at both ends of the main loop section (11) covering the front surface of the dielectric substrate (30) and both ends of the main loop section (11) covering the back surface of the dielectric substrate (30) and has a load of capacitance component. A control section (20) is connected with the main loop section (11) and controls information through a radio wave.