DISPOSITIVO AD ONDE SUPERFICIALI PARTICOLARMENTE PER LA REALIZZAZIONE DI FILTRI E RELATIVO PROCEDIMENTO DI FABBRICAZIONE

摘要

A single-phase unidirectional surface acoustic wave transducer comprising a piezoelectric substrate and a transducer having localized symmetry and constructed for establishing a predetermined separation between the centers of acoustic wave reflection and transduction on said substrate by selectively orienting the transducer on a specific cut of said substrate to achieve a separation between said centers in a continuum of achievable phase angles of 0 DEG -360 DEG .