Abstract: The invention relates to an electroacoustic transducer for a component operating with surface waves, comprising two electrodes having alternately arranged fingers and stub fingers, each connected to a bus bar, the opposing fingers and stub fingers being separated from one another by gaps. In this case, the position of the gaps in the transverse direction preferably has a periodic variation. The pattern of the variation in the gap positions, which, in particular, influences the excitation intensity of the acoustic wave in the edge region of the transducer, is selected so that the excitation profile of the acoustic wave is adjusted to the predetermined energy density profile. As a result of such an adjustment, it is possible to significantly reduce signal losses at the resonant frequency.

Abstract: SAW component with improved temperature coefficient of frequency To reduce losses in a SAW component assembled on a piezoelectric substrate (S), the mass load on the metallization (M) is increased until the propagation velocity of the surface wave comes to rest below the propagation velocity of the fast shear wave. To limit the increase in the temperature coefficient of frequency in this process, a metallization with a significantly higher specific density than [that of] Al is used. The temperature coefficient of frequency of the component is simultaneously reduced by a compensation layer (K) applied to essentially the entire surface, said compensation layer being made of a material having a temperature dependency of the elastic coefficient that counteracts that of the substrate-metallization combination.

Abstract: A component operating with surface-proximal acoustic waves, in particular a filter with novel structure, has interdigital transducers arranged in serial and parallel branches, which are acoustically coupled with one another in different configurations. The component provides a loss-poor filter with simultaneously space-saving arrangement of the filter elements.

Abstract: A surface acoustic wave filter having compensated capacitive and inductive crosstalk between adjacent IDT input and output transducers includes electromagnetically coupled transducers split into partial transducers. The routing of the partial transducer pads is modified such that the flux directions of the magnetic couplings between the adjacent partial transducers are oppositely directed so that the total induced magnetic flux is zero. The partial transducers are connected in series or in parallel such that, in the case of symmetric operation, the crosstalk capacitances between adjacent pads and transducer surfaces are balanced at the corresponding port.

Abstract: In order to reduce scattering losses during the transmission of a surface acoustic wave signal, a surface acoustic wave arrangement has a junction between two mutually offset surface acoustic wave structures designed so that the finger period is reduced in the region of the junction, and varies continuously in the region of the junction.

Abstract: Substrate lamina made of langasite or langatate with a crystal cut (X1, X2, X3) for langasite in a range around the Euler angle combination (100°, 1400°, 166°) or the Euler angle combinations equivalent thereto, or respectively with special angle combinations of langatate.