SPATIALLY SELECTIVE UHF NEAR FIELD MICROSTRIP COUPLER DEVICE AND RFID SYSTEMS USING DEVICE
First Claim
1. A printer including a transceiver adapted to communicate with transponders, comprising:
- a printhead;
a media conveyance adapted to transport a series of discrete media to said printhead and through a transponder operating region, at least some of said media including a transponder;
a near field coupler configured to generate a near field effect to couple with the transponder for data transfer;
the near field coupler having a plurality of lines electrically interconnected in parallel, and a spaced away ground plane.
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Accused Products
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 electromagnetic 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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Citations
8 Claims
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1. A printer including a transceiver adapted to communicate with transponders, comprising:
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a printhead; a media conveyance adapted to transport a series of discrete media to said printhead and through a transponder operating region, at least some of said media including a transponder; a near field coupler configured to generate a near field effect to couple with the transponder for data transfer; the near field coupler having a plurality of lines electrically interconnected in parallel, and a spaced away ground plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification