License plate radio electronic identifier
US9875439B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2017 |
| Grant date | Jan 23, 2018 |
| Priority date | — |
| Expiry date | Jun 27, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/017
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A license plate radio electronic identifier is provided. Through an isolated space defined between an RFID tag in an elongate frame of an identifier and a license plate to form a resonant cavity at a slot of a metal film antenna on the RFID tag, the metal film antenna can resonate and sense an electromagnetic wave signal reflected by the surface of the license plate through the resonant cavity. The electromagnetic wave signal of a frequency band is transmitted to a radio frequency identification chip under the action of the frequency band and the field pattern adjustment of the slot and a groove. The overall structure of the identifier serves as radio identification for a vehicle. The identifier is resistant to a metal interference and capable of long distance reading and can be put into mass production and is cost-effective.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.