RFID TAG AND METHOD FOR ADJUSTING RESONANT FREQUENCY THEREOF

• Main Authors: IEGAKI MASATAKA, SHOJI NORIYUKI
• Format: Patent
• Language: English
• Published: 10.11.2005
• Edition: 7
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; BOOK COVERS; BOOKBINDING; CALCULATING; COMPUTING; COUNTING; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; ELECTRICITY; FILES; HANDLING RECORD CARRIERS; LOOSE LEAVES; MOVABLE-STRIP WRITING OR READING APPARATUS; PERFORMING OPERATIONS; PHYSICS; PRESENTATION OF DATA; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; RECOGNITION OF DATA; RECORD CARRIERS; SPECIAL PRINTED MATTER; TRANSPORTING

PROBLEM TO BE SOLVED: To provide an RFID tag with a simple constitution capable of stably maintaining a desired resonant frequency, even when environmental changes occur, and also is capable of reducing costs, and to provide a method for adjusting its resonant frequency. SOLUTION: The RFID tag 1 has a coil conductor pattern 12 operated by a prescribed resonant frequency and is provided with an FPC 11, the coil conductor pattern 12, a crossover pattern 13, and an IC 14. The coil conductor pattern 12 includes a detour pattern 12b, which is connected in parallel to a part of a linear conductor 12a constituting the main part of an antenna coil. The inductance of the overall coil conductor pattern 12 can be adjusted, by cutting off a prescribed position of the detour pattern 12b. By this, the resonant frequency of the RFID tag can be adjusted properly. COPYRIGHT: (C)2006,JPO&NCIPI