COUPLING STRUCTURE FOR A GALVANICALLY SEPARATING TRANSMISSION OF A HIGH FREQUENCY SIGNAL AND INVERTER

A coupling structure (50) for a galvanically separating transmission of a high frequency signal between an antenna (30) and a sending/receiving unit (40), the coupling structure comprises a first reference plate (200) arranged in a first metal layer of a multilayer printed circuit board (300), and a second reference plate (21) arranged in a second metal layer of the multilayer printed circuit board (300). The first reference plate (200) is connected to a reference potential terminal (42)of the sending/receiving unit (40) and the second reference plate (200) is connected to a reference potential terminal (32) of the antenna (30). The coupling structure further comprises a first metal line (220) connected to a signal terminal (41) of the sending/receiving unit (40) and arranged in a third metal layer of a multilayer printed circuit board (300), and a second metal line (230) connected to a signal terminal(31)of the antenna (30) and arranged in a fourth metal layer of a multilayer printed circuit board (300), the third and fourth metal layer interposed between the first and the second metal layer. In a projection perpendicular to the plane of the multilayer printed circuit board, the first reference plate (200) and the second reference plate (210) form a complementary arrangement with a boundary line (250), and the first metal line (220) and the second metal line (230) form a ring structure (240), the ring structure (240) comprising a first ring segment (241) and a second ring segment (242) with the first metal line (220) and the second metal line (230) running in parallel to each other in the first and second ring segment, and a third ring segment (243) and a fourth ring segment (244), each arranged at both ends between the first and second ring segment. The third ring segment (243) is solely formed by the first metal line (220) and the fourth ring segment (244) is solely formed by the second metal line (230). An end of the first metal line (220) and an end of the second metal line (230) are each located at the boundary line (250) within the projection. The coupling structure (50) may form part of a communication structure (20), and the communication structure 20 may be implemented within an inverter (1). L'invention concerne une structure de couplage (50) pour une transmission de séparation galvanique d'un signal haute fréquence entre une antenne (30) et une unité d'émission/réception (40), laquelle structure de couplage comprend une première plaque de référ