Abstract: A secure access control method uses a reader and a radiocommunication mobile terminal. The reader includes a first radiocommunication module having a first range and a second radiocommunication module having a second range less than the first range. The mobile terminal includes a first radiocommunication chip that establishes a first radiocommunication channel with the first radiocommunication module and a second radiocommunication chip that establishes a second radiocommunication channel with the second radiocommunication module. The method implements two modes of operation. In the first mode, when the mobile terminal is at a distance from the reader less than the first range and greater than the second range, the first radiocommunication channel is established. In the second mode, when the mobile terminal is at a distance from the reader less than the second range, the second radiocommunication channel is established as a priority.

Abstract: The invention relates to electronic radiofrequency identification in the ultra-high frequency (UHF) range for marking an article (4) that is to be identified in a constraining environment. For this purpose, an electronic device (2) comprises: a dielectric substrate (12) having a peripheral edge face (13) and a ground face (15); an electronic chip (16); and a curved and short-circuited antenna (9) (PIFA) that presents a radiating area defined by at least two dipoles (19, 20). The antenna (9) on a transmission surface (14) of the substrate (12) is connected by a short-circuiting element (17) presenting a short-circuiting area presenting an area in projection on the edge face (13) that is of the order of 3% to 5% of the radiating area of the curved antenna (PIFA).

Abstract: The invention relates to electronic radiofrequency identification in the ultra-high frequency (UHF) range for marking an article (4) that is to be identified in a constraining environment. For this purpose, an electronic device (2) comprises: a dielectric substrate (12) having a peripheral edge face (13) and a ground face (15); an electronic chip (16); and a curved and short-circuited antenna (9) (PIFA) that presents a radiating area defined by at least two dipoles (19, 20). The antenna (9) on a transmission surface (14) of the substrate (12) is connected by a short-circuiting element (17) presenting a short-circuiting area presenting an area in projection on the edge face (13) that is of the order of 3% to 5% of the radiating area of the curved antenna (PIFA).