Multi-layered efficient RFID coupler
US7425887B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2005 |
| Grant date | Sep 16, 2008 |
| Priority date | — |
| Expiry date | Mar 16, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/206
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A RFID coupler capable of selectively communicating with a targeted transponder from among a group of multiple adjacent transponders. The coupler includes a grounded terminal load, a coupling element, a connecting element, an impedance matching element, and an input terminal. The coupling element is connected with the grounded terminal load and is configured to couple with the transponder by emanating an electromagnetic field. The input terminal is connected to a transceiver for receiving communication signals. The impedance matching element is connected to the input terminal and is configured to substantially match an input impedance of the coupler to a source impedance of the transceiver. The connecting element connects the impedance matching element to the coupling element. The coupling element and the impedance matching element are substantially parallel and separated by at least one dielectric layer and at least one ground plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.