SHOPLIFTING PREVENTING ELECTRIC RESONANT TAG USING COMB-SHAPED CAPACITOR AND COMB-SHAPED CAPACITOR

摘要

PURPOSE: To improve the sensing power of a shoplifting preventing electric resonant tag and to provide a capacitor for preventing the occurrence of eddy currents. ;CONSTITUTION: A coil 20 is provided on one surface 10a of a dielectric film 10 and one electrodes 31a and 32a of capacitors 31 and 32 are respectively provided at both ends of the coil 10. The electrodes 31a and 32a have comb- shaped notches 33. In addition, the other electrodes 31b and 32b of the capacitors 31 and 32 are provided on the rear surface 10b of the film 10 so that the electrodes 31b and 32b can be respectively faced to the electrodes 31a and 32a. the electrodes 31b and 32b also have comb-shaped notches 33. Finally, a capacitor coupling section 34 couples the electrodes 32a and 32b of the capacitor 32 on the rear surface 10b of the film 10 to each other.;COPYRIGHT: (C)1995,JPO