EP 1815406 A4 20090520 - DISTRIBUTED ANTENNA ARRAY WITH CENTRALIZED DATA HUB FOR DETERMINING PRESENCE AND LOCATION OF RF TAGS
Title (en)
DISTRIBUTED ANTENNA ARRAY WITH CENTRALIZED DATA HUB FOR DETERMINING PRESENCE AND LOCATION OF RF TAGS
Title (de)
VERTEILTE ANTENNENGRUPPE MIT ZENTRALISIERTEM DATENVERTEILER ZUR BESTIMMUNG VON PRÄSENZ UND POSITION VON HF-MARKEN
Title (fr)
RESEAU D'ANTENNE DISTRIBUE A PASSERELLE CENTRALISEE D'ENTREE DE DONNEES POUR DETERMINER LA PRESENCE ET L'EMPLACEMENT DE REPERES RF
Publication
Application
Priority
- US 2005037138 W 20051018
- US 62527304 P 20041105
Abstract (en)
[origin: WO2006052386A2] A distributed antenna array with a centralized data hub for determining the presence and location of RF tags has been disclosed. This antenna array centralizes electronics and distributes the RF to zones in a facility to greatly reduce the expense of recurring components for monitoring RF tags. A single BRT/hub with multiple antennas attached to transmit and receive ports is used to cover an entire facility. Large facilities are covered by a small number of the BRT/hub combinations. The BRT/hub has transmit antennas coupled thereto, preferably by co-axial cable, that transmit signals to a portion or all of the RF tags and all or a portion of them modulate and reflect the RF signal to a particular receiving antenna. The receiving antenna then returns the RF signal with tag data to the BRT/hub, preferably by co-axial cable. Also disclosed is a RF backscatter tag that cleanly switches a resonant aperture antenna on and off, thereby greatly increasing the mark-to-space ratio of the backscatter data. This enables tags to be detected by the BRT at much greater distances.
IPC 8 full level
G06K 19/00 (2006.01); G06K 7/08 (2006.01); H01Q 21/28 (2006.01)
CPC (source: EP)
H01Q 1/2216 (2013.01); H01Q 1/38 (2013.01); H01Q 15/0006 (2013.01); H01Q 21/28 (2013.01)
Citation (search report)
- [XY] US 2003209601 A1 20031113 - CHUNG KEVIN KWONG-TAI [US]
- [XY] US 2003174099 A1 20030918 - BAUER DONALD GEORGE [US], et al
- [XY] US 2002190845 A1 20021219 - MOORE SCOTT E [US]
- [X] US 2002011967 A1 20020131 - GOFF EDWARD D [US], et al
- [Y] US 2003097302 A1 20030522 - OVERHULTZ GARY L [US], et al
- [Y] US 2004056091 A1 20040325 - OVERHULTZ GARY L [US], et al
- See references of WO 2006052386A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006052386 A2 20060518; WO 2006052386 A3 20060727; AU 2005305253 A1 20060518; CA 2586576 A1 20060518; CA 2586576 C 20140401; EP 1815406 A2 20070808; EP 1815406 A4 20090520
DOCDB simple family (application)
US 2005037138 W 20051018; AU 2005305253 A 20051018; CA 2586576 A 20051018; EP 05804354 A 20051018