Optimum cut for rotated Y-cut LiNbO₃crystal used as the substrate of acoustic-surface-wave filters

Suppression of Rayleigh wave spurious signal in ultra-wideband surface acoustic wave devices employing 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 single crystals

“…Although the K 2 for the slower SAW at θ∼48 o is lower than that at θ=0 o , the value of 48% is still nearly ten times compared to that achievable by conventional piezoelectric materials, such as LiNbO 3 (5%). 17,18 It should be noted that the thickness of the gold electrode was set to 0.06λ in our calculation so that the K 2 for the faster SAW becomes almost zero. Deviation of h from this value resulted in increase in the minimum K 2 for the faster SAW.…”

Suppression of bulk-wave responses in SAW devices using the difference of power flow angles

“…Their predictions are supported by many experiments, but there are some experimental results which cannot be explained by their theory [4]- [6]. Yashiro and Goto have overcome certain of these discrepancies by introducing the boundary conditions at the surface of the substrate when the bulk wave responses are calculated [2].…”

“…Low bulk-wave serious response is also one of the desirable properties for a SAW substrate. Therefore, many studies of substrates with low bulk-wave serious response have been performed theoretically [1]- [3] and experimentally [4]- [6].…”

HYbriD Resonant Acoustics (HYDRA)

“…[ 2 ] Additionally, the thickness of the substrate h is designed to be substantially larger than the SAW wavelength λ SAW to avoid wave leakage and refl ection through the thickness of the substrate given that the SAW penetration depth varies inversely with the SAW resonant frequency f ; in other words, the vibrational energy of the SAW is locally confi ned within a…”