| 摘要 |
A surface-guided bulk wave transducer (102) comprises a stack of an acoustic substrate (6), an electric ground plane (8), and a network (110) of synchronous acoustic excitation sources with two combs (112, 114) of elementary piezoelectric transducers (122, 124, 126, 128, 130, 132) 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 (6). Each elementary piezoelectric transducer (122, 124, 126, 128, 130, 132) includes a single and different rod with a parallelepipedal shape for which the nature, the cut of the piezoelectric material, the height h, the width are selected for increasing the electromechanical coupling coefficient of the transducer assembly (102) to a high level. |
