System comprising a plurality of devices that can be addressed by radiofrequency, and method for addressing by activation of a transparent mode

摘要

Each device ( 1 a, 1 b, 1 c) comprises a processing circuit connected to a first antenna ( 4 ), designed to be coupled to an external antenna ( 3, 5 ), and a second antenna ( 5 ) designed to be coupled to an antenna ( 4 ) of a higher-ranking device ( 1 ). The system comprises a reading unit and devices ( 1 ) having a predetermined ranking. The first antenna ( 4 a) of the rank one device ( 1 a) is coupled to an antenna ( 3 ) of the reading unit. Addressing by the reading unit of a device ( 1 c) ranking higher than one is performed by means of the associated lower-ranking devices ( 1 a, 1 b). A device ( 1 a 1 ) of predetermined ranking is associated with a sub-set ( 8 a) of higher-ranking devices ( 1 b 11, 1 b 12 ) so as to form a hierarchical tree structure.