Mode analysis of longitudinal multi mode SAW resonator filter

Author

Ichikawa, Satoshi ; Kanasaki, Hiroshi ; Akahori, Naoki ; Koshino, Masayoshi ; Ebata, Yasuo

Author_Institution

Device Eng. Dept., Toshiba Corp. Display Device & Components Co., Yokohama, Japan

Volume

1

fYear

2001

fDate

2001

Firstpage

101

Abstract

This paper describes the mode analysis for a longitudinal multi mode SAW resonator filter having 5 IDTs between the grating reflectors. The mode analysis is carried out at several conditions and frequencies, focusing on trap response. At the trap canceling condition, two resonant modes coincide in frequency and degenerate. Furthermore, at the fundamental resonant mode, SAW distribution at the center of electrode is distorted to be undulatory. In order to unify the SAW distribution of the fundamental mode, electrode pitches are adjusted partially. The developed balanced DCS-Rx filter realized low insertion loss of under 2 dB successfully

Keywords

frequency response; interdigital transducers; modal analysis; surface acoustic wave resonator filters; 2 dB; IDTs; SAW distribution; balanced DCS-Rx filter; electrode pitches; fundamental resonant mode; grating reflectors; longitudinal multi mode SAW resonator filter; low insertion loss; mode analysis; trap canceling condition; trap response; Band pass filters; Bandwidth; Displays; Electrodes; Gratings; Impedance; Resonance; Resonant frequency; Resonator filters; Surface acoustic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2001 IEEE

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-7177-1

Type

conf

DOI

10.1109/ULTSYM.2001.991588

Filename

991588