A four-pole SAW resonator filter combining transverse and symmetrical longitudinal modes

Author

Martin, G. ; Wall, B.

Author_Institution

Inst. fur Festkoerper- und Wekstofforschung, Dresden, Germany

Volume

1

fYear

1997

fDate

5-8 Oct 1997

Firstpage

37

Abstract

As a continuation of the activities concerning longitudinal and transverse modes, the present paper describes the combination of transverse and neighboring longitudinal modes with the same symmetry for designing a four-pole resonator filter. The construction of both interdigital transducers arranged side by side agrees and is characterized by a symmetrical withdrawing weighting. The present solution offers the advantage to achieve a wider bandwidth for the same layout dimensions compared with the principle using neighboring longitudinal modes of different symmetry. The applicability of the principle to the filter design is demonstrated by experimental measurements

Keywords

interdigital transducers; surface acoustic wave resonator filters; surface acoustic wave transducers; bandwidth; four-pole SAW resonator filter; four-pole resonator filter; interdigital transducers; layout dimensions; symmetrical longitudinal modes; symmetrical withdrawing weighting; symmetry; transverse modes; Band pass filters; Bandwidth; Electric potential; Fingers; Frequency locked loops; Passband; Resonance; Resonator filters; Surface acoustic waves; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE

Conference_Location

Toronto, Ont.

ISSN

1051-0117

Print_ISBN

0-7803-4153-8

Type

conf

DOI

10.1109/ULTSYM.1997.662975

Filename

662975