Apparatus and method for communicating with an RFID transponder
First Claim
1. A system for communicating with a transponder on a carrier substrate in a printer, the system comprising:
- a feed path extending through the printer such that the printer is configured to receive the carrier substrate along the feed path;
a transceiver configured to be energized to communicate with the transponder; and
a controller in communication with the transceiver and configured to selectively energize the transceiver to a first power level to write data to the transponder within a write region and to a second power level to read data from the transponder within a read region, wherein the second power level is different from the first power level, wherein the read region is substantially the same as the write region, and wherein the first power level and the second power level are at least substantially independent of a signal'"'"'s frequency produced when the transceiver is energized.
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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.
79 Citations
13 Claims
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1. A system for communicating with a transponder on a carrier substrate in a printer, the system comprising:
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a feed path extending through the printer such that the printer is configured to receive the carrier substrate along the feed path; a transceiver configured to be energized to communicate with the transponder; and a controller in communication with the transceiver and configured to selectively energize the transceiver to a first power level to write data to the transponder within a write region and to a second power level to read data from the transponder within a read region, wherein the second power level is different from the first power level, wherein the read region is substantially the same as the write region, and wherein the first power level and the second power level are at least substantially independent of a signal'"'"'s frequency produced when the transceiver is energized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification