Antenna and method for mounting an antenna on a vehicle by a clamping force, preferably obtained by a translational displacement action

The invention relates to an apparatus and a method for fastening an antenna, in particular a roof antenna (1) to a vehicle body (12) with a base plate (2) arranged outside the body and connected to the roof antenna (1) and with a support element inside the body, which is connectable by means of a threaded connection with the bottom plate (2), wherein the support element is formed as a bayonet disc (6), wherein the threaded connection (screw 3) comprises a tension spring (compression spring (5), which has a clamping force between the bottom plate (2) and the bayonet plate (6) is produced, wherein between the bottom plate (2) and the bayonet disc (6) guide elements (bolts 8, slot openings 9) are provided which allow a limited displacement of the bottom plate (2) and the bayonet disc (6) against each other,wherein the Bajvnettscheibe (6) limiting elements (elevations 10), which match the opening in the body (triangular opening 11) and wherein between the bottom plate (2) and the bayonet disc (6) spacer elements (13) with corresponding recesses (14) in the second component are provided, which in one displacement position of the bottom plate (2) to the bayonet plate (6) ensure a distance of the bottom plate (2) to the bayonet plate (6) and protrude in the other displacement position in the recesses (14).the one in a displacement position of the bottom plate (2) to the bayonet plate (6) ensure a distance of the bottom plate (2) to the bayonet plate (6) and protrude in the other displacement position in the recesses (14).the one in a displacement position of the bottom plate (2) to the bayonet plate (6) ensure a distance of the bottom plate (2) to the bayonet plate (6) and protrude in the other displacement position in the recesses (14).