SPATIALLY SELECTIVE UHF NEAR FIELD MICROSTRIP COUPLER DEVICE AND RFID SYSTEMS USING DEVICE
摘要
A system having a UHF RFID transceiver is adapted to communicate exclusively with a single electro-magnetically coupled transponder located in a predetermined confined transponder operating region. The system includes a near field coupling device comprising a plurality of lines connected in parallel with an unmatched load. The near field coupling device may be formed, for example on a printed circuit board with a plurality of electrically interconnected traces and a ground plane. The system establishes, at predetermined transceiver power levels, a mutual electro-magnetic coupling which is selective exclusively for a single transponder located in a defined transponder operating region. Also included are methods for selective communication with the transponder in an apparatus such as a printer-encoder.
申请公布号
WO2005022445(A2)
申请公布日期
2005.03.10
申请号
WO2004US27832
申请日期
2004.08.26
申请人
ZIH CORP.;DONATO, DANIEL, F.;GAWELCZYK, ROBERT;HOHBERGER, CLIVE, P.;TORCHALSKI, KARL;TSIRLINE, BORIS, Y.
发明人
DONATO, DANIEL, F.;GAWELCZYK, ROBERT;HOHBERGER, CLIVE, P.;TORCHALSKI, KARL;TSIRLINE, BORIS, Y.