RF device and method with improved active load modulation capability
US9401739B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2014 |
| Grant date | Jul 26, 2016 |
| Priority date | — |
| Expiry date | Jul 1, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/48
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is described an RF bidirectional communication device utilizing active load modulation, the device comprising (a) a resonance circuit including an antenna (326), and (b) a control unit (322) for controlling communication of the device, including switching between a transmission mode and a receiving mode, wherein the control unit is adapted to (c) modify a configuration of the resonance circuit such that the resonance circuit has a first resonance frequency (f0) when the device is in the transmission mode and a second resonance frequency (f0+Δf) when the device is in the receiving mode, and (d) modify the configuration of the resonance circuit such that a Q-factor of the resonance circuit is periodically decreased while the device is in the transmission mode. There is also described a corresponding method and a system comprising a RF device and a reader/writer device. Furthermore, there is described a computer program and a computer program product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.