Transducer structure that operates with acoustic waves

摘要

For improved conformance of a filter operating with acoustic waves, a transducer structure is proposed in which the separations between respectively two adjacent electrode fingers of an inter-digital transducer (IDTv) vary over the length of the transducer. The variation thereby preferably follows a continuous distribution function. Reactance filters that are provided with such filters in the serial branch show an improved electrical conformance in the transmission range.