Implantable passive RFID tag
US11392816B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Apr 27, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/265
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved passive RFID tag configured for needle implantation in a tail of a rodent using a small diameter needle provides for increased read distances and effectiveness. In various embodiments, the RFID tag is comprised of an elongated flexible substrate having a pair of opposed surfaces with a UHF RFID chip positioned on a first of the opposed surfaces and is directly electrically connected to a closed-loop multi-layer folded dipole antenna disposed on both of the opposed surfaces of the substrate. An antenna is electrically connected to the RFID chip and includes at least an inductor as part of the closed-loop antenna. In embodiments, the RFID tag can be read with at least 90 percent effectiveness by a 30 dB RFID tag reader at least 5 cm from a tail of the rodent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.