The present invention relates to a circuit board arrangement including a circuit board, whose metallization comprises at least one coplanar stripline for supplying signals to a radiator, in particular a mobile communication radiator. In this circuit board arrangement, the circuit board comprises a field converter, which is electrically connected to the coplanar stripline and which conducts a coaxial field through at least one layer of the circuit board and converts it into the coplanar stripline field of the coplanar stripline.