Abstract: A method for tracking the activity of animals confined in a facility including at least one cage, a plurality of antennae arranged underneath the at least one cage, an RFID reader to which the plurality of antennae are connected, a computer capable of controlling transmission and reception by the RFID reader, and an RFID tag to be fitted to an animal confined in the cage, the method including that the following steps are carried out:—the animal is fitted with the tag,—the RFID reader generates the transmission of an electromagnetic wave at the plurality of antennae,—the RFID reader identifies which antenna(e) has/have received the response transmitted by the tag,—the computer analyses over a given period which antennae have received a signal transmitted by the tag, thus determining the consecutive positions of the animal.

Abstract: Antenna system comprising at least two radiating elements, a first line for neutralizing electromagnetic coupling between the at least two radiating elements, at least one radiofrequency power supply line for each radiating element and at least one short-circuiting line to a ground plane of the antenna system per radiating element, characterized in that the antenna system further comprises: at least one second line for neutralizing electromagnetic coupling between said at least two radiating elements; elements for activating at least some of the neutralization lines; and in that the activation elements are configured to selectively activate or deactivate at least some of the neutralization lines, in such a way that depending on the activation/deactivation thereof the neutralization lines provide a maximum neutralization of the electromagnetic coupling of the radiating elements for a plurality of different frequencies.

Abstract: An alarm device comprises an RFID circuit that is configured to store identification information and is coupled to an antenna designed to receive and to emit, from and to an RFID reader, signals at the frequency of the RFID reader, and a switch coupled to the antenna and able to be activated by a user, enabling the antenna to be matched to the frequency of the RFID reader. The alarm device comprises the RFID circuit, the antenna and the switch designed to be incorporated into an object worn by a user, and enable the alarm to be activated discreetly.

Abstract: An alarm device comprises an RFID circuit that is configured to store identification information and is coupled to an antenna designed to receive and to emit, from and to an RFID reader, signals at the frequency of the RFID reader, and a switch coupled to the antenna and able to be activated by a user, enabling the antenna to be matched to the frequency of the RFID reader. The alarm device comprises the RFID circuit, the antenna and the switch designed to be incorporated into an object worn by a user, and enable the alarm to be activated discreetly.

Abstract: Antenna system comprising at least two radiating elements, a first line for neutralising electromagnetic coupling between the at least two radiating elements, at least one radiofrequency power supply line for each radiating element and at least one short-circuiting line to a ground plane of the antenna system per radiating element, characterised in that the antenna system further comprises: at least one second line for neutralising electromagnetic coupling between said at least two radiating elements; elements for activating at least some of the neutralisation lines; and in that the activation elements are configured to selectively activate or deactivate at least some of the neutralisation lines, in such a way that depending on the activation/deactivation thereof the neutralisation lines provide a maximum neutralisation of the electromagnetic coupling of the radiating elements for a plurality of different frequencies.