RF switched RFID multiplexer
US8941471B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2006 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Jun 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10356
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A radiofrequency identification (RFID) multiplexer, which may be in a network, interprets an RF signal from an RFED reader as RFE) tag interrogation data. A single cable directs an RF signal from the RFID reader and RF control signals and/or RF power through the multiplexer. An RF sampler may be coupled to the cable; and an RF detector detects the RF signal from the cable via the RF sampler. A data decoder decodes and interprets the RF signal as the RFID tag interrogation data and forwards the RFID tag interrogation data to a control logic circuit as a MUX channel-change command. The logic circuit and decoder may be combined in a microcontroller, and an RF backscatter modulator coupled to the cable enables reverse communication with the RFID reader to determine whether another RFID multiplexer is coupled to the RFID multiplexer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.