Knobbe Martens Olson & Bear LLP
Transducer with bulk waves surface-guided by synchronous excitation structures
A surface-guided bulk wave transducer includes a stack of an acoustic substrate, an electric ground plane, and a network of synchronous acoustic excitation sources with two combs of elementary piezoelectric transducers alternately interlaced two-by-two according to a periodic network step corresponding to a propagation mode of a surface-guided bulk wave of the acoustic substrate. Each elementary piezoelectric transducer includes a single and different rod with a parallelepipedal shape for which the nature, the cut of the piezoelectric material, the height h, and the width are selected for increasing the electromechanical coupling coefficient of the transducer assembly to a high level.
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Viktor Sylvain
Plesski Ballandras