Abstract: A surface acoustic wave (SAW) filter includes a piezoelectric substrate, and acoustic tracks on the piezoelectric substrate. The acoustic tracks are adjacent and electrically interconnected. The acoustic tracks include electro-acoustic transducers. The electro-acoustic transducers include an input transducer and an output transducer. The SAW filter also includes a shielding structure that is metallic and that is connected to ground. The shielding structure is between the acoustic tracks. The shielding structure shields a first electro-acoustic transducer in a first acoustic track from a second electro-acoustic transducer in a second acoustic track.

Abstract: A component operating with acoustic waves is described herein. The component includes a substrate having an underside subdivided into a center area and an edge area surrounding die center area on all sides. The component also includes a plurality of outer terminals in the edge area, and a plurality of inner terminals in the center area comprising at least a first inner terminal configured as a signal terminal.

Abstract: An electrical component is described with a first signal path (TX, RX1) and a second signal path (RX, RX2) that are connected to a common signal path (ANT, RX12). In the first signal path a first filter (F1) is arranged, and in the second signal path a second filter (F2) is arranged. The component comprises a first matching circuit (MA1) that comprises a shunt arm to ground. In the shunt arm, an inductor (L) is arranged, which is connected to the first signal path, the second signal path, and the common signal path. The component comprises a carrier substrate (SU) on which the filters (F1, F2), which are preferably implemented as chips, are mounted. The inductor (L) is integrated in the carrier substrate (SU).

Abstract: Between the two acoustic tracks of a SAW filter constructed on the surface of a piezoelectric substrate, a metallic shielding structure is positioned and connected to ground in order to shield two transducers positioned in different tracks. In this way crosstalk within a filter is prevented and the stop-band selection is improved.

Abstract: A surface acoustic wave (SAW) filter having an improved edge steepness includes at least three resonators connected in series and/or parallel with one another. An edge steepness of a pass band is improved if a plurality of resonators with different finger periodicities of interdigital transducers are provided.

Abstract: A reactance filter, particularly in a branching circuit (ladder type),with surface wave resonators wherein omission weighted normal finger transducers are employed between reflectors such that the arrangement and plurality of the active fingers of the interdigital transducer are particularly formed for changing the capacitance relationship (static to dynamic capacitance) such that a narrow filter bandwidth is achieved.