A transducer operating with surface acoustic waves is specified, which is divided into cells, whose length essentially equals one wavelength, comprising cells of the second type, which are SPUDT cells and which have an excitation intensity of 100%, and at least one cell of the first cell type, which has at least four excitation centers, wherein an excitation center lies between two adjacent fingers with different polarities, and wherein the cell of the first cell type has an excitation intensity of a maximum of 30%.