A shaft antenna system for mobile communication comprises an antenna housing into which at least one antenna is introduced or can be introduced. A support frame has an insertion opening and a circumferential wall by which a receptacle space is bounded. The receptacle space is accessible from the insertion opening, and the antenna housing is arranged in the receptacle space. A termination cover assembly closes off the insertion opening. The termination cover assembly is supported at its edge region at least indirectly on the support frame. An underside of the termination cover assembly covers an upper side of the antenna housing. The antenna housing is supported at least indirectly on the support frame via at least one force storage device. The force storage device comprises at least one foam module which has elastic, resilient and damping properties, to hold the upper side of the antenna housing is pressed against the underside of the termination cover assembly.