Dual antenna coil transponder system
US7347379B2 · kind B2 · utility
37Cited by
12References
55Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2002 |
| Grant date | Mar 25, 2008 |
| Priority date | — |
| Expiry date | Oct 18, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a dual antenna coil identification system, and more particularly, to an interrogator or reader for inductively coupling to a transponder and thereby extract data from the transponder. The magnetic field required to energize a transponder is generated by currents flowing through two essentially identical but opposite phased antenna coils arranged near the area where tags are to be read.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.