Contribution to the Non-linear Properties of the SAW Transducers

One of the important properties of the SAW transducer is the sensitivity to the external acting quantities. This sensitivity depends both on the strain and relative SAW velocity change due to the external, namely electric fields. The basic equations describing both contributions are presented in the paper. The resulting relative frequency change of the SAW transducer is the result of the strain due to the dimensions changes and the relative SAW velocity change due to the non-linear effects. The configuration of the oriented substrate (may be with domain wall), and the equations describing an influence of the electric field are described. Both the SC-cut quartz-and LiNbO
₃
substrates are discussed considered in this paper. The principle or new configuration may be used for SAW applications.