Coil for RFID tag
US12056555B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2021 |
| Grant date | Aug 6, 2024 |
| Priority date | — |
| Expiry date | Aug 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
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. 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.