| 发明名称 |
ANTENNA COIL STRUCTURE OF TRANSPONDER FOR RFID, ADJUSTING METHOD FOR RESONANCE FREQUENCY AND RFID SYSTEM PROVIDED WITH THE TRANSPONDER |
| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide the antenna coil of a transponder for RFID capable of easily adjusting a resonance frequency, an adjusting method for the resonance frequency and an RFID system provided with a reader / writer suitable for the transponder. <P>SOLUTION: A connection position adjustment area is provided on one end or both ends of two antenna patterns 5a and 5b formed on the front and back surfaces of a base material 7, and the resonance frequency is adjusted by varying a connection position. A film capacitor is omitted and the transponder is reduced. By eliminating the need of trimming work, the adjusting work of inductance is easily executed and the change of a coupling coefficient and the generation of an eddy current by the deviation of the electric center position of an antenna are prevented. Also, by using the transponder, the reflection coefficient of the reader / writer is increased and the constitution of a reader / writer reception part is simplified. <P>COPYRIGHT: (C)2004,JPO</p> |
| 申请公布号 |
JP2004080600(A) |
申请公布日期 |
2004.03.11 |
| 申请号 |
JP20020240458 |
申请日期 |
2002.08.21 |
| 申请人 |
MITSUBISHI MATERIALS CORP |
发明人 |
HORIUCHI HIDEAKI;UBUKATA YASUHIRO;INUI SHINICHIRO |
| 分类号 |
G06K19/077;G06K17/00;G06K19/07;H01Q1/24;H01Q7/00;H04B1/59;H04B5/02;(IPC1-7):H04B1/59 |
主分类号 |
G06K19/077 |
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