Flexible flat conductor with integrated output filter

The present invention relates to a flexible flat conductor including at least two electrically conductive layers which are at least partially surrounded by an electrically insulating cover, said electrically conductive layers being insulated from one another by at least one dielectric layer arranged therebetween. Furthermore, the invention relates to a power supply unit provided with such a flexible flat conductor. In order to provide an improved flexible flat conductor as well as a power supply unit with such a flexible flat conductor, wherein the filtering can be improved, the amount of space required can be reduced and, at the same time, the cost of manufacture can be lowered, at least a first one of said electrically conductive layers is patterned in at least one subarea thereof by openings in such a way that a plurality of meandrous elements is formed, said meandrous elements being serially juxtaposed in a plane defined by the flat conductor, so as to form a filter structure.