The invention relates to a smartcard, particularly an electronic prepayment card, identification card or similar, with at least one transponder unit, and to a method for producing such a smartcard, wherein the transponder unit has at least one chip and at least one antenna connected to the chip, wherein the antenna is made from a conductor that is arranged on an antenna substrate, wherein the extension of the antenna is limited to a patch of the antenna substrate and the antenna has a plurality of conducting lead with at least two windings separated from each other, which windings are arranged so that their axes are at least partly parallel to an axis of symmetry of the smartcard.