Influence of conducting layer and conducting electrode on acoustic waves propagating in potassium niobate plates

The influence of a thin conducting layer and a conducting electrode on the characteristics of acoustic waves propagating in thin plates of potassium niobate is investigated theoretically. The variations in velocity and attenuation as high as 50% and 30 dB per wavelength, respectively, can be achieved for a change in conductance of the thin film layer from 10/sup -7/ to 10/sup -5/ S.