Title:
COIL FOR RFID TAG
Document Type and Number:
WIPO Patent Application WO/2022/039159
Kind Code:
A1
Abstract:
[Problem] To provide a coil that has satisfactory characteristics even when the coil is used by being attached to or embedded in a tire, the coil forming an RFID tag in combination with a substrate on which an RF chip and a pattern coil connected to the RF chip are mounted. [Solution] A coil 30 is held in a housing 75 accommodating a substrate 90 and is wound around the substrate 90. A first end of the coil 30 extends from the substrate 90 and forms a first element 50 of an antenna. A second end of the coil 30 extends from the substrate 90 and forms a second element 60 of the antenna. The first element 50 and the second element 60 are arranged in parallel to each other, and the first element 50 has a longer extension length than the second element 60. The coil 30 and a pattern coil 40 form a coupling transformer 20. The number of windings in the coil 30 is smaller than the number of windings in the pattern coil 40.
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Inventors:
SUGIMURA SHIRO (JP)
ISHIBASHI TAKAHIRO (JP)
ISHIBASHI TAKAHIRO (JP)
Application Number:
PCT/JP2021/030037
Publication Date:
February 24, 2022
Filing Date:
August 17, 2021
Export Citation:
Assignee:
PHOENIX SOLUTION CO LTD (JP)
HOKURIKU ELECT IND (JP)
HOKURIKU ELECT IND (JP)
International Classes:
G06K19/077; H01Q1/50; H01Q9/04
Domestic Patent References:
| WO2017022511A1 | 2017-02-09 | |||
| WO2017082017A1 | 2017-05-18 |
Foreign References:
| JP2008167190A | 2008-07-17 | |||
| US20080245851A1 | 2008-10-09 | |||
| JP2011097586A | 2011-05-12 | |||
| JP2017132291A | 2017-08-03 | |||
| JP2019222421A | 2019-12-09 |
Attorney, Agent or Firm:
CREIA IP ATTORNEYS (JP)
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