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Integrated and flexible guided acoustic wave transducers have been made using line shape mechanical gratings together with sol-gel fabricated integrated ultrasonic transducers at the opposite side. They can be used to generate and receive guided surface and plate acoustic waves and to operate up to 150??C. Preliminary results show the potentials of them for nondestructive evaluation and structural...
LiNbO3 is the substrate most often used in wireless identification tags because of its large electromechanical coupling constant. A single-phase unidirectional transducer (SPUDT) on LiNbO3 is attractive to realize a wireless SAW sensor with reduced size, low insertion loss, low passband ripple, and high degree of linearity of phase. A natural single-phase unidirectional transducer (NSPUDT) produces...
Rayleigh-wave (SAW) touch panels are widely used in a number of applications such as information kiosks, interactive museum exhibits, and amusement arcade games. Such products involve 90deg scattering of Rayleigh waves by grating reflector arrays for which each reflector grating element is at an angle of 45deg with respect to the incident wave. Development of innovative ultrasonic touch sensors motivates...
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