Issue |
J. Phys. IV France
Volume 137, November 2006
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Page(s) | 115 - 118 | |
DOI | https://doi.org/10.1051/jp4:2006137023 | |
Published online | 23 December 2006 |
J. Bodzenta, M. Dzida and T. Pustelny
J. Phys. IV France 137 (2006) 115-118
DOI: 10.1051/jp4:2006137023
The complex effective surface permittivity of SAW piezoelectric substrates
A. Kawalec and W. KomorniczakMilitary University of Technology, 2 Gen. Kaliskiego Str., 00908 Warsaw, Poland
(Published online 23 December 2006)
Abstract
The analysis of the effective surface permittivity which
unambiguously characterizes the piezoelectric material features is
presented. The use of the effective surface permittivity significantly
simplifies the theoretical analysis of the interdigital transducer. It
enables the transformation from the complex continuum mechanics problem to
the field theory area. The calculations of the complex effective surface
permittivity of selected types of dielectric material applied as a basis for
the surface acoustic wave devices are presented. The calculations results
can be used to estimate the band of the possible bulk waves. Currently it is
one of the most crucial problem of the surface acoustic wave devices. The
example of the experimental filter with the distorted frequency
characteristics described by the imaginary part of the effective surface
permittivity is presented.
© EDP Sciences 2006