Frequency selective surface aids to the operation of RFID products
US7884718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2006 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Nov 29, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q15/0013
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to systems that use frequency selective surfaces (FSS) to aid in the operation of radio frequency identification (RFID) devices and products. In one embodiment, a system for interrogating radio frequency identification (RFID) tags includes a conveyor belt and an RFID reader. The conveyor belt has a first surface and a second surface. The first surface is configured to receive an item to which an RFID tag is affixed and the second surface is configured to slide on a metal slide plate. The RFID reader is configured to transmit instructions embodied in a radio frequency (RF) signal to the RFID tag, wherein the metal slide plate is positioned between the RFID reader and the RFID tag and comprises a frequency selective surface that is substantially transparent to the RF signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.