Data carrier with modification means for modifying the load...

Details Data carrier with modification means for modifying the load... Data carrier with modification means for modifying the load...

2011-03-15

2011-03-15

Lu, Zhiyu (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Short range rf communication

C340S010100, C340S010300

Reexamination Certificate

active

07907897

ABSTRACT:
In a data carrier (1), there are provided modification means (19) for modifying, as a function of the distance between the data carrier (1) and the base station (4), the ratio of the duration of a load period (TB) to the duration of an off-load period (TE), at which ratio the data carrier (1) load-modulates the electromagnetic field (HF) generated by a base station (4).

REFERENCES:
patent: 6462647 (2002-10-01), Roz
patent: 7283810 (2007-10-01), Arakawa et al.
patent: 0 699 591 (1999-12-01), None

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