Slotted antenna comprising an electrode radiofrequency signal injector and device comprising such an antenna

An electronic device comprising:

• a chassis of an electrically conductive material, comprising a front side, a rear side and a side wall,
• a closed-slot antenna for transmitting or receiving data in a specified frequency band, made in the side wall of the chassis and having a radiation axis substantially perpendicular to the side wall, and
• a wireless communication circuit configured to provide a radio frequency signal to the closed-slot antenna,
• wherein the closed-slot antenna comprises:
• a longitudinal port in and through the side wall of the chassis,
• a radio frequency signal injector for applying a ground voltage to a first surface of the longitudinal port and applying the radio frequency signal to a second surface of the longitudinal port, the signal injector comprising:
• first and second flat electrodes substantially parallel to each other, the first electrode resting on the first surface of the longitudinal port and the second electrode resting on the second surface of the longitudinal port, and
• a compression element of a flexible and elastic material, arranged between the first and second electrodes and exerting on the first and second electrodes a spreading force which presses the first electrode against the first surface of the longitudinal port and presses the second electrode against the second surface of the longitudinal port.