Experimental investigation on the operation of SAW devices at harmonic frequencies with stepped-finger interdigital transducer

Author

Sato, T. ; Otsuka, S. ; Okajima, H. ; Motegi, R.

Author_Institution

Tokimec Inc., Tokyo, Japan

Volume

1

fYear

1996

fDate

3-6 Nov 1996

Firstpage

267

Abstract

Stepped-finger IDTs operate at one desired harmonic, while suppressing fundamental and all other harmonics. However, if the IDT is used at microwave frequencies, a proper experimental study of some structural problems which may potentially have an affect on the response would be needed. This paper describes the feasibility of using the stepped-finger IDT at microwave frequencies. SAW delay lines operating at the 5th harmonic frequencies of 2.3, 3.4 and 4.6 GHz are studied. As a result, it is found that the degree of suppression of fundamental decreases as the 5th harmonic frequency is raised. This paper also describes the application of the stepped-finger IDT except for filters and delay lines. A 2-port SAW resonator operating at the 5th harmonic frequency of 1 GHz is studied and the resonator which has a loaded Q of 5000 is obtained

Keywords

acoustic microwave devices; interdigital transducers; surface acoustic wave delay lines; surface acoustic wave resonators; 2.3 GHz; 3.4 GHz; 4.6 GHz; SAW devices; SAW resonator; delay lines; fundamental suppression; harmonic frequencies; loaded Q; stepped-finger interdigital transducer; structural problems; Delay lines; Fingers; Insertion loss; Microwave devices; Microwave filters; Microwave frequencies; Power harmonic filters; Surface acoustic wave devices; Surface acoustic waves; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE

Conference_Location

San Antonio, TX

ISSN

1051-0117

Print_ISBN

0-7803-3615-1

Type

conf

DOI

10.1109/ULTSYM.1996.583971

Filename

583971