Remote communication device and system for communication
US7710239B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 2004 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Feb 4, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Remote communication devices (i.e., radio frequency identification (RFID) tag) and systems for communicating between one or more RFID tags and a reader using a frequency modulation method to encode binary data are disclosed herein. For example, a remote communication device includes an antenna operable to receive and backscatter a carrier signal, wherein the backscattered carrier signal further comprises a secondary signal within an identification bandwidth. The remote communication device also includes a signal processing circuit coupled to the antenna, the signal processing circuit comprising at least one encoding circuit operable to encode binary data into the backscattered carrier signal by periodically modulating the frequency of the secondary signal from one encoding frequency to another one of 2n+1 encoding frequencies within the identification bandwidth, wherein n is an integer greater than or equal to 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.