Electronic article surveillance (EAS) tag/device with coplanar and/or multiple coil circuits, an EAS tag/device with two or more memory bits, and methods for tuning the resonant frequency of an RLC EAS tag/device
US7498948B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2007 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Sep 10, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2448
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An EAS device, and methods for making the device for tuning the resonant frequency of the same is disclosed. The EAS device includes: an outer inductor having one end coupled to a linear or nonlinear capacitor plate; an inner inductor having one end coupled to the other type of capacitor; a first dielectric film on the outer and inner inductors and the capacitor plates coupled thereto, having openings exposing other ends of the outer and inner inductors; a second linear capacitor plate on the dielectric film; a second nonlinear capacitor plate on the dielectric film; a second dielectric film containing holes for the second linear and nonlinear capacitor plates, and exposing the other ends of the first and second inductors; and first and second conducting straps on the second dielectric film, configured to electrically connect one of the exposed inductor ends to a corresponding second capacitor plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.