Patent ID: 6114926
Filing Date: 2000-09-05
Classification: H03H

Abstract:
A double-mode surface-acoustic-wave device, comprising:a piezoelectric substrate;first and second reflectors provided on said piezoelectric substrate along a propagation path of a surface acoustic wave on said piezoelectric substrate; andfirst, second and third interdigital electrodes provided on said piezoelectric substrate consecutively from said first reflector to said second reflector,at least one of said first through third interdigital electrodes having a primary side electrode connected to a first input/output terminal and a secondary side electrode connected to a second input/output terminal,each of said first through third interdigital electrodes including first through third pairs of electrode fingers respectively, whereinsaid first pair of electrode fingers for said first interdigital electrode is different from said third pair of electrode fingers for said third interdigital electrode.