A1 - The Influence of a Bulk Waves on the Characteristics of a SAW filters
- Event
- 20th Jubilee Winter Workshop
on Acoustoelectronics
2024-02-24 - 2024-02-27
Szczyrk, Beskidy Mountains (Poland) - Chapter
- Acoustoelectronics
- Author(s)
- A. Kawalec, M. Walenczykowska - Military University of Technology, Warsaw
(Poland) - Pages
- 6 - 7
- DOI
- 10.5162/20WWonAE/A1
- ISBN
- 978-3-910600-05-8
- Price
- free
Abstract
The effective surface permittivity, which uniquely characterize its electrical surface properties of a piezoelectric substrate is presented. This approach allows to transform a complex problem from the mechanics of a continuous medium into the field theory. The imaginary part of this permittivity is related to the excitation of an acoustic bulk waves by an interdigital transducer. Using the presented calculation results for a given piezoelectric substrate, it is possible to estimate the band in which bulk waves occur, distorting the characteristics of filters with a surface acoustic wave (SAW).