Broadband SAW-convolver, using dispersive IDTs with capacitive weighting

Author

Boritko, S.V. ; Grigorievskii, V.I. ; Kmita, A.M.

Author_Institution

Inst. of Radio Eng. & Electron., Acad. of Sci., Moscow, Russia

Volume

1

fYear

1996

fDate

3-6 Nov 1996

Firstpage

77

Abstract

The problem of development of SAW convolvers with a wide relative passband and linear phase is decided by use of IDTs with capacitive weighting. A degenerate convolver with central frequency 95 MHz, relative passband of 36% and time of integration 20 μs was investigated. Dispersive IDTs with capacitive weighting for excitation of SAW were used. Uniform distribution of acoustic energy under the aperture of an acoustic beam takes place in the convolver, and diffraction effects are infinitesimally small. Additionally, it is easy to control the frequency response, that permits compensation for distortions arising in external electronic circuits

Keywords

capacitance; convolution; frequency response; interdigital transducers; surface acoustic wave convolution; 20 mus; 95 MHz; broadband SAW convolver; capacitive weighting; degenerate convolver; dispersive IDTs; distortion compensation; frequency response control; linear phase; Acoustic beams; Acoustic diffraction; Acoustic distortion; Apertures; Convolvers; Dispersion; Electronic circuits; Frequency response; Passband; Surface acoustic waves;

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.1996.583800

Filename

583800