System and method for selective communication with RFID transponders
AssigneeZIH Corp., a Delaware Corporation with its principal office in Hamilton, Bermuda
InventorsBoris Y. Tsirline, Clive P. Hohberger, Robert Gawelczyk
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Abstract
A system having an RFID transceiver is adapted to communicate exclusively with a single RFID transponder located in a predetermined confined transponder target area. The system includes a magnetic coupling device comprising a magnetic flux generator responsive to a radio frequency input signal and a magnetic field pattern former. The pattern former is configured to collect flux produced by the flux generator and to form a field pattern in the location of the transponder target area. The system establishes, at predetermined transceiver power levels, a mutual magnetic coupling which is selective exclusively for a single transponder located in the transponder target area.
Claims30
A printer including a transceiver adapted to communicate with RFID transponders, comprising:
- a printhead;
- a media conveyance adapted to transport a series of discrete media to said printhead and through a transponder target area, at least some of said media including an RFID transponder;
- a magnetic flux generator having a planar coil formed as a trace upon a first layer of a printed circuit board responsive to a radio frequency input signal;
- and
- a magnetic field pattern former configured to collect flux produced by said magnetic flux generator and to form a field pattern in the location of said transponder target area, said transceiver being configured to establish at predetermined power levels a mutual magnetic coupling which is selective exclusively for a single transponder located in said transponder target area.
A system comprising an RFID transceiver and adapted to communicate exclusively with a single RFID transponder located in a predetermined confined transponder target area, said system comprising:
- a magnetic flux generator responsive to a radio frequency input signal;
- a magnetic field pattern former configured to collect flux produced by said flux generator and to form a field pattern in the location of said transponder target area;
- and
- an electric field suppressor located between said magnetic flux generator and said target area;
- said system being configured to establish at predetermined transceiver power levels a mutual magnetic coupling which is selective exclusively for a single transponder located in said transponder target area.
Dependencies are inferred from the claim text.