Systems and methods of beamforming in radio frequency identification applications
US7652577B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2007 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Dec 7, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10346
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for beamforming in radio frequency identification (RFID) applications are disclosed. A beamforming system uses a distributed architecture and techniques for antenna beamforming using a feedback control loop to direct radio frequency (RF) energy onto a specific region, referred to as an interrogation zone, which includes a calibration node where one or more RFID tags may be located. The distributed architecture of the beamforming system is resistant to fading and shadowing effects, providing accurate RFID reader operation even in environments with multi-path reflections or environmental changes, such as people moving around or changes in the location of equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.