RFID tag identification methods, devices, and algorithms based on eigen-mode technique
US11068674B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2021 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Feb 15, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0672
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A character Identification method has been proposed to obtain a specific reaction of a tag inside a printed chipless RFID system on a lossy dielectric substrate. The proposed technique is based on the eigenmode resonance to generate weight excitation coefficients and to extract a desired current distribution induced on the tag illuminated by a transmitter/receiver antennas arrays using the SVD-eigenmodes. The proposed methodology is based on techniques such as the proposed regrouping method to create groups of tags and the correlation method applied between a measure receive signal and the receive signal belong the library (or the create database). This method allows the confirmation/or not of the belonging of the tag to a group and the recognition of the measure tag based on two important parameters: the magnitude and the phase of an identification vector. The CIM method allows the user to better distinguish the tag from others, and to improve the independence from the environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.