1. A method for producing a radio-frequency antenna in a conductor structural element with a layer construction, comprising the following steps:providing a rigid carrier having an outer underside and a top side;
defining an antenna assignment section on the rigid carrier;
applying at least one electrically insulating layer with a recess in such a way that the antenna assignment section is exposed;
placing a radio-frequency substrate above the antenna assignment section with formation of a cavity between the rigid carrier and the radio-frequency substrate;
aligning and fixing the radio-frequency substrate relative to the rigid carrier;
laminating the layer construction such that resin material of the at least one electrically insulating layer liquefies and encloses the radio-frequency substrate with the cavity being left free;
cutting the antenna assignment section out of the rigid carrier from the outer underside of the rigid carrier.