Scattering Parameters of Interdigital and Group Type Unidirectional Saw Transducers

Abstract

In this paper, the frequency dependence of scattering parameters of simple bidirectional transducers and group-type unidirectional transducers have been studied using cross-field model equivalent circuit. The analytical expressions for scattering parameters developed are simple for the purpose of computation. The scattering parameters were also measured experimentally for transducers fabricated on Y-cut, Z-propagating LiNbO₃ substrate. The experimental curves of the different scattering parameters versus frequency agree generally with the theoretical curves.

Indexing terms:

• Surface acoustic waves
• Transducers
• Scattering