System and method for interrogation radio-frequency identification
US8624710B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2007 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Dec 7, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10217
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for communicating with contactless IC cards of multiple protocols and power levels includes generating a first alternating magnetic field with an interrogator for energizing a proximate IC card and receiving a data transmission from the IC card. A processor of the interrogator is configured to decode the received data transmission. The interrogator then generates a second alternating magnetic field having a different magnetic field strength than the first alternating magnetic field when failing to decode the data transmission being received from the IC card. The processor then attempts to decode a data transmission received from the IC card in response to the second alternating magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.