US Patent 11502386 Attachment arrangement of an antenna device for a vehicle

An antenna device for a vehicle includes a base plate, an expansion element formed by a first expansion element part and a second expansion element part mated with the first expansion element part, and an actuating element cooperating with the base plate and the expansion element. Each of the first expansion element part and the second expansion element part has a flat area, a side arm protruding at an angle from the flat area, and a laterally open breakthrough in the flat area. The laterally open breakthrough of each of the first expansion element part and the second expansion element part when mated forms a single passage opening for the actuating element.