Electronic device, method and system for half duplex data transmission
US9179492B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 26, 2011 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Mar 14, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00198
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An electronic device and method for half duplex data transmission in a long range keyless entry and go system, and more specifically to an RFID transponder, a corresponding read/write (R/W) unit and methods for operating the RFID transponder and the R/W-unit. There is a first coil, a second coil and a third coil, being arranged as a three-dimensional antenna, a first capacitor, a second capacitor and a third capacitor couplable in parallel to the first coil, the second coil and the third coil, respectively, for selectively forming a first, a second and a third parallel-resonant circuit for receiving radio signals, a series-resonant circuit for transmitting radio signals and a control stage configured to either use one of the first, second or third parallel-resonant circuits for receiving radio signals or the series-resonant circuit for transmitting signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.