Invention Grant
- Patent Title: Radio tag and system
- Patent Title (中): 无线电标签和系统
-
Application No.: US12089037Application Date: 2006-07-04
-
Publication No.: US08111138B2Publication Date: 2012-02-07
- Inventor: John K Stevens , Paul Waterhouse
- Applicant: John K Stevens , Paul Waterhouse
- Applicant Address: CA Mississauga, Ontario
- Assignee: Visible Assets, Inc.
- Current Assignee: Visible Assets, Inc.
- Current Assignee Address: CA Mississauga, Ontario
- Agency: Larson & Anderson, LLC
- International Application: PCT/IB2006/052255 WO 20060704
- International Announcement: WO2007/039835 WO 20070412
- Main IPC: H04Q5/22
- IPC: H04Q5/22

Abstract:
Passive tags use two antennas with only limited mutual coupling one of which receives a power/clock field and the other of which receives a data signal. An area-reading antenna, or two or more antennas, are deployed to generate the power/clock field, from a base station. The base station, or active tags, or both, generate the data signals from time to time. This topology together with the use of low frequencies permits area reads, and permits small and economical passive tags, and further permits localization of a particular passive tag as being nearby to a particular active tag.
Public/Granted literature
- US20090027166A1 Radio Tag and System Public/Granted day:2009-01-29
Information query