Performance of bonded, single-crystal LiNbO₃and LiGaO₂as ultrasonic transducers operating above 100 Mhz

Fabrication of bonded, single-crystal transducers to operate in fundamental thickness-shear and thickness-longitudinal modes at frequencies around 300 MHz is reported. The experimental results show that these transducers have performance that is superior in a number of ways to competitive thin-film piezoelectric transducers.