Mobile RFID reader and method of eliminating a transmission leakage signal
US8081061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2007 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Oct 19, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mobile radio-frequency identification (RFID) reader includes a high-frequency front-end unit including an antenna, a circulator, an output amplifier, and a signal processor chip. The signal processor chip includes a high-frequency transceiver, a pseudo-leakage signal generator configured to generate a pseudo-leakage signal based on a transmission high-frequency signal, the transmission high-frequency signal being provided from the high-frequency transceiver and being provided to the high-frequency front-end unit and a subtractor configured to subtract the pseudo-leakage signal from a received high-frequency signal to generate a subtracted signal, the pseudo-leakage signal corresponding to a transmission leakage signal included in the received high-frequency signal, the received high-frequency signal being provided from the high-frequency front-end unit, and the subtracted signal being provided to the high-frequency transceiver. Therefore, the RFID reader may eliminate a transmission leakage signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.