Surface acoustic wave filter duplexer and communications apparatus utilizing edge reflection of SH-type waves

摘要

A surface acoustic wave filter includes edge-reflection type surface acoustic wave resonators arranged as series and parallel arm resonators and connected in a ladder configuration. The edge-reflection type surface acoustic wave resonators defining the series and parallel arm resonators are disposed on a single common substrate and arranged so as to be substantially parallel to the end surface of the edge-reflection type surface acoustic wave resonators.