Electronically variable time delay in a LiNbO3SAW delay line

The time delay of surface acoustic waves (SAW's) in 128° rotated Y-cut, X-propagating LiNbO
3
is found to vary linearly with a biasing electric field. Fractional changes in time delay greater than 9 × 10
^-4
have been obtained in a delay line fabricated using this material.