Unidirectional dispersive transducers and applications to efficient elastic convolvers

Author

Yamanouchi, Kazuhiko ; Ogata, Jun´ichi ; Mihota, Norihito ; Kato, Shunji

Author_Institution

Res. Inst. of Electr. Common., Tohoku Univ., Japan

fYear

1991

fDate

8-11 Dec 1991

Firstpage

251

Abstract

Elastic convolvers are very important for signal-processing devices for spread-spectrum communication systems. The better efficient convolvers are required for the application of the devices. A chirp transducer which is one of the dispersive transducers, can give a comparatively low insertion loss and wideband property for the convolvers. The authors found the unidirectional property of the chirp transducer by taking account of reflection of surface acoustic waves (SAWs) caused by electrodes. The directivity is in the down-chirp direction. The unidirectional property and its application to elastic convolvers are described

Keywords

acoustic transducers; convolutional codes; surface acoustic wave devices; SAW reflection; chirp transducer; down-chirp direction; efficient elastic convolvers; electrodes; low insertion loss; signal-processing devices; spread-spectrum communication systems; surface acoustic waves; unidirectional dispersive transducers; wideband property; Acoustic reflection; Acoustic transducers; Acoustic waves; Chirp; Convolvers; Dispersion; Insertion loss; Spread spectrum communication; Surface acoustic wave devices; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1991. Proceedings., IEEE 1991

Conference_Location

Orlando, FL

Type

conf

DOI

10.1109/ULTSYM.1991.234164

Filename

234164