Spatially selective UHF near field microstrip coupler device and RFID systems using device
First Claim
1. A method for communication with a plurality of transponders that are configured to move through a transponder operation region, comprising:
- transmitting near field RF communication signal, into the transponder operating region;
determining a first signal power level operationally effective to communicate with a first transponder, of the plurality of transponders, disposed in a first position within the transponder operation region;
storing data associated with the first power level and the first position;
determining a second signal power level operationally effective to communicate with a second transponder, of the plurality of transponders, disposed in a second position within the transponder operating region;
storing additional data associated with the second power level and the second position; and
operationally communicating with the remaining plurality of transponders located in the first position and the second position using the data and the additional data to determine power levels and positions of the remaining plurality of transponders region.
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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 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.
84 Citations
24 Claims
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1. A method for communication with a plurality of transponders that are configured to move through a transponder operation region, comprising:
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transmitting near field RF communication signal, into the transponder operating region; determining a first signal power level operationally effective to communicate with a first transponder, of the plurality of transponders, disposed in a first position within the transponder operation region; storing data associated with the first power level and the first position; determining a second signal power level operationally effective to communicate with a second transponder, of the plurality of transponders, disposed in a second position within the transponder operating region; storing additional data associated with the second power level and the second position; and operationally communicating with the remaining plurality of transponders located in the first position and the second position using the data and the additional data to determine power levels and positions of the remaining plurality of transponders region. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A transceiver configured to communicate with a plurality of transponders that are configured to move through a transponder operating region, the transceiver comprising:
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a coupler configured to transmit a near field RF communication signal into the transponder operating region; and a processor configured to; determine a first signal power level operationally effective to communicate with a first transponder, of the plurality of transponders, disposed in a first position within the transponder operating region; store data associated with the first power level and the first position; determine a second signal power level operationally effective to communicate with a second transponder, of the plurality of transponders, disposed in a second position within the transponder operating region; store additional data associated with the second power level and the second position; and operationally communicate, via the coupler, with the remaining plurality of transponders located in the first position and the second position using the data and the additional data to determine power levels and positions of the remaining plurality of transponders. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A printer configured to print media comprising a plurality of transponders, the printer comprising:
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a coupler configured to transmit a near field RF communication signal into a transponder operating region; a print station configured to print indicia to the media; a media conveyance configured to move the media through the transponder operating region and the print station; a processor configured to; determine a first signal power level operationally effective to communicate with a first transponder, of the plurality of transponders, disposed in a first position within the transponder operating region; store data associated with the first power level and the first position; determine a second signal power level operationally effective to communicate with a second transponder, of the plurality of transponders, disposed in a second position within the transponder operating region; store additional data associated with the second power level and the second position; and operationally communicate, via the coupler, with the remaining plurality of transponders located in the first position and the second position using the data and the additional data to determine power levels and positions of the remaining plurality of transponders. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification