Broadband SAW-convolver, using dispersive IDTs with capacitive weighting

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 /spl mu/s was investigated. Dispersive IDTs with...

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Bibliographic Details
Published in1996 IEEE Ultrasonics Symposium. Proceedings Vol. 1; pp. 77 - 79 vol.1
Main Authors Boritko, S.V., Grigorievskii, V.I., Kmita, A.M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1996
Subjects
Acoustic beams
Acoustic diffraction
Acoustic distortion
Apertures
Convolvers
Dispersion
Electronic circuits
Frequency response
Passband
Surface acoustic waves
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Summary: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 /spl mu/s 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.
ISBN:0780336151
9780780336155
ISSN:1051-0117
DOI:10.1109/ULTSYM.1996.583800