Contacting an antenna

To produce a cohesive metallic connection between a connection surface (8) one on a card-shaped substrate (2) arranged antenna (3) and a contact surface (5) of an electronic module (4) is a multi-layer contact foil (10) adjacent to the terminal surface (8) of the antenna (3). In the multi-layer contact film (10) is a contact sheet that is prepared at least from a plurality of less than one micron thick adjacent layers from each other exothermically reacting materials, in particular a so-called "nano-film". After placing the multi-layer contact foil (10) is triggered by "firing" of the multi-layer film contact the exothermic reaction in the contact multi-layer film (10) and thus generates the cohesive metallic compound.