Abstract
The propagation and resonance properties of longitudinal leaky surface acoustic waves on structures consisting of a LiTaO3 (LT) thin plate bonded to a quartz (Qz) similar-material bonded structure were investigated theoretically. It was found by surface acoustic wave (SAW) propagation analysis that a small attenuation can be obtained by combining an LT thin plate and a Qz similar-material bonded structure with appropriate Euler angles. Furthermore, regarding SAW resonance analysis, resonances with admittance ratios exceeding 50 dB and Q factors exceeding 1000 were obtained in the LT/Qz/Qz bonded structure. Such a small propagation loss and high Q can be obtained with a larger LT plate thickness than in the case of the LT/Qz bonded structure.
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