ANTENNA COIL STRUCTURE OF TRANSPONDER FOR RFID, AND ADJUSTING METHOD OF RESONANCE FREQUENCY USING THE ANTENNA COIL

摘要

PROBLEM TO BE SOLVED: To provide structure of an antenna coil of a transponder for RFID(Radio Frequency Identification) capable of easily and exactly adjusting resonance frequency of a device having a resonant circuit such as a transponder for RFID, and to provide an adjusting method of the resonance frequency which uses the antenna coil.

SOLUTION: In the label-like or sheet-like transponder 2 having the resonance circuit consisting of a chip capacitor 7 and the antenna coil 4 constituted by loop of one or more turns and an IC chip, inductance of the antenna coil is adjusted, and the resonance frequency is matched with a desired value by forming wiring for mounting the IC chip connected to both terminals of the antenna coil 4 longer.

COPYRIGHT: (C)2005,JPO&NCIPI