SPUDT-based filters: design principles and optimization

Author

Hodé, J.M. ; Desbois, J. ; Difilie, P. ; Solal, M. ; Ventura, P.

Author_Institution

Thomson Microsonics, Sophia-Antipolis, France

Volume

1

fYear

1995

fDate

7-10 Nov 1995

Firstpage

39

Abstract

Tremendous work has been done all over the world to overcome the difficult problems of triple transit and insertion loss in SAW filters. Most of research efforts towards low losses have consisted of introducing reflections in the filter designs. Two major classes of low loss filters have emerged during the past 20 years, resonator filters and Single Phase UniDirectional Transducer (SPUDT) filters. This paper reviews the design principles of this second class, including some representative examples of actual devices

Keywords

losses; optimisation; surface acoustic wave filters; surface acoustic wave transducers; tuning; SAW filters; SPUDT theory; SPUDT-based filters; constrained design problem; insertion loss; low loss filters; multitrack structures; resonant cavities; short-circuit reflection; single phase unidirectional transducer filters; triple transit suppression; weighting functions; Design optimization; Finite impulse response filter; Insertion loss; Reflection; Resonator filters; SAW filters; Surface acoustic waves; Transducers; Transversal filters; Ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE

Conference_Location

Seattle, WA

ISSN

1051-0117

Print_ISBN

0-7803-2940-6

Type

conf

DOI

10.1109/ULTSYM.1995.495537

Filename

495537