Telecommunications – Transmitter and receiver at separate stations – Near field
Reexamination Certificate
2008-07-08
2008-07-08
Anderson, Matthew (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Near field
C455S041200, C455S151200, C455S330000, C343S749000, C235S451000
Reexamination Certificate
active
07398054
ABSTRACT:
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.
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Donato Daniel
Gawelczyk Robert
Hohberger Clive P
Tsirline Boris Y
Alston & Bird LLP
Anderson Matthew
Dao Minh
ZIH Corp.
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