Method for selecting and writing into RFID-transponders
AssigneeLucatron AG
InventorPhilipp Müller
Life of this patent
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Abstract
Method and system for reading out and writing to RFID-transponders with inductive coupling including a read/write unit with a transmission frequency fs1 defined as a basic transmission frequency and a plurality of transponders operated at a resonance frequency fR. The resonance frequency fR is fixedly predetermined, then for operating conditions with a high distance range, the resonance frequency fR equal to the basic transmission frequency fs1 is selected. For operating conditions with a high recognition rate with a plurality of transponders located within a detection field, the basic transmission frequency fs1 is reduced to a fixed alternative value fs2 . This procedure guarantees reliable communication between the transponders and the read/write unit.
Claims7
Method for reading out and writing to RFID-transponders with inductive coupling comprising a read/write unit with a transmission frequency fsl defined as a basic transmission frequency and a plurality of transponders operated at a resonance frequency fR, comprising the steps of:
- fixedly predetermining the resonance frequency fR,
- for operating conditions with a high distance range, selecting the resonance frequency fR equal to the basic transmission frequency fs1, and
- for operating conditions with a high recognition rate with a plurality of transponders located within a detection field, reducing the basic transmission frequency fs1 to a fixed alternative value fs2,
- thereby guaranteeing reliable communication between the transponders and the read/write unit.
Dependencies are inferred from the claim text.