Tag communication system having a controlled antenna array to prevent interference
US7701351B2 · kind B2 · utility
11Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 2007 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Jun 6, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10435
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a tag communication system, an interference preventing method and a tag communication controller suitable for prevention of a radio wave interference able to be caused by radio waves mutually emitted when plural tag communication devices are arranged. Plural reader-writers are oppositely arranged through a belt conveyer for conveying an article. A null of the reader-writer is opposed to a null of the reader-writer. A null of the reader-writer is opposed to a null of the reader-writer. Main lobes are directed to a direction causing no mutual interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.