Method for reading out radio frequency identification tags, involves providing transponder within operating distance of reader, where transponder emits set of data, where data are received by reader

摘要

The method involves sending a carrier signal in a frequency range of two transponders (1, 2) by an antenna. One of the transponders is provided outside operating distance of a reader, where the transponder obtains energy from the carrier signal and transmits a set of data. The other transponder is provided within the operating distance of the reader, where the latter transponder receives the data directly from the former transponder and emits another set of data including the former set of data. The latter set of data is received by the reader. An independent claim is also included for a transponder comprising a microprocessor.