G. Martin et al., SAW FILTER RESONANT-FREQUENCY ADJUSTMENT BY ELECTROSTRICTIVE AND PIEZOELECTRIC ACTUATORS, Ferroelectrics. Letters section, 17(1-2), 1994, pp. 21-23
Electrostrictive and piezoelectric actuators are used to adjust the SA
W resonant structures by means of of strain induced voltage controlled
change of the linear dimensions of the resonators. The effect is also
used for the precise measurements of the actuator displacement under
the external load with the accuracy 10(-5).