Slot-type ultra-wideband depolarized chipless RFID tag
US11822993B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2022 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Nov 1, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07773
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a slot-type ultra-wideband depolarized chipless RFID tag. The tag comprises a tag slot unit, a metal plate and a dielectric substrate, wherein the tag slot unit is formed by means of etching the metal plate, and is located on the upper surface of the dielectric substrate; the tag slot unit is composed of at least four annular slot groups, and tags are distributed in a centrosymmetric manner; and each annular slot group is composed of four concentric annular slots that are distributed in a nested manner; a transceiver antenna TX transmits a horizontally polarized electromagnetic wave; a scattered wave obtained; a transceiver acquires a frequency spectrum of the scattered wave; the spectrum is converted into a time-domain signal; a response of the tag is extracted; and an MFCC feature of the time-domain signal is extracted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.