HANDPIECE ASSEMBLY FOR MEDICAL DEVICE

A handpiece assembly for medical device is described, comprising a handpiece (4) for medical device, comprising a distal handpiece portion (22) adapted to receive an insert tip assembly (1) comprising a radiofrequency identifier (3), an insert tip antenna (8) and an insert tip (2) adapted to interact with a part of a patient's body. The handpiece assembly for medical device (4) further comprises a handpiece antenna (12), arranged in the handpiece distal portion (22), and radiofrequency signal supply means, configured to provide a radiofrequency signal to the handpiece antenna (12) adapted to be transmitted by the handpiece antenna (12). The handpiece antenna (12) is configured to wirelessly communicate with the insert tip antenna (8) when said insert tip assembly is inserted into the handpiece (4) in an insertion region comprised in the handpiece distal portion (22). The handpiece antenna (12) is a loop antenna or segmented ring antenna comprising at least two handpiece antenna segments, electrically arranged in series, wherein a first end of a first segment is operatively connected to a first terminal of said radiofrequency signal supply means, and a second end of a last segment of said at least two handpiece antenna segments is operatively connected to a second terminal of said radiofrequency signal supply means, to form, around said insertion region, a coil radiating structure configured to generate an electromagnetic field in the insertion region with a radiofrequency dependent on said radiofrequency signal. Each of said at least two handpiece antenna segments comprises a radiant metal element, characterized by a respective inductance, electrically connected in series with a capacitive element, having a capacitance such as to compensate for effects due to the inductance of the radiant metal element on currents circulating in the coil of the handpiece antenna (12) and to adapt the characteristic impedance of the handpiece antenna (12) to the radiofrequency generator of the control element (21) of the medical device (20). A medical device (20) is further described comprising a control element (21), an insert tip assembly (1), and a medical device handpiece assembly as described above. L'invention concerne un ensemble pièce à main destiné à un dispositif médical, comprenant une pièce à main (4) destinée à un dispositif médical, comprenant une section de pièce à main distale (22) conçue pour recevoir un ensemble pointe d'insert (1) comprenant un identifica