Abstract: A system for detecting proximity between a first transceiver and a second transceiver. Each of the first and the second transceivers includes at least one primary and secondary radio module. The primary radio module of the first transceiver is able to communicate with the primary radio module of the second transceiver, and the secondary radio module of the first transceiver is able to communicate with the secondary radio module of the second transceiver. The first and the second transceivers are configured to estimate a primary communication distance between the primary radio module of the first transceiver and the primary radio module of the second transceiver, and estimate a secondary communication distance between the secondary radio module of the first transceiver and the secondary radio module of the second transceiver.

Abstract: Apparatus for transmitting and/or receiving radiofrequency signals comprising at least a broadband antenna (310) and a substrate (410); the antenna (310) comprising at least a first radiating surface (318) and being superimposed on the ground plane, the ground plane being located on a first face of the substrate (410), at least a side tongue of power supply (314) and at least a side wall (316) connected to at least the first radiating surface (318), the apparatus being characterized in that the side wall (316) is connected to a coupling trace (416) located on a second face of the substrate (410), opposite to the first face of the substrate (410), and the side wall (316) and the coupling trace (416) being configured to act as a capacitive coupling between at least the first radiating surface (318) and the ground plane.

Abstract: Apparatus for transmitting and/or receiving radiofrequency signals comprising at least a broadband antenna (310) and a substrate (410); the antenna (310) comprising at least a first radiating surface (318) and being superimposed on the ground plane, the ground plane being located on a first face of the substrate (410), at least a side tongue of power supply (314) and at least a side wall (316) connected to at least the first radiating surface (318), the apparatus being characterized in that the side wall (316) is connected to a coupling trace (416) located on a second face of the substrate (410), opposite to the first face of the substrate (410), and the side wall (316) and the coupling trace (416) being configured to act as a capacitive coupling between at least the first radiating surface (318) and the ground plane.