New PDF release: Advances in surface acoustic wave technology, systems and

By Clemens C. W. Ruppel

ISBN-10: 9810245386

ISBN-13: 9789810245382

A part of a set of 14 experiences of a variety of subject matters in acoustic wave expertise, aimed toward the medical viewers. positive aspects seven really good papers in all, discussing problems with observed units, from Green's capabilities to instant observed sensor platforms.

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Additional info for Advances in surface acoustic wave technology, systems and applications. Vol. 2

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Is negative and it describes slowing of the wave due to the electric loading. 47 Conductive electrodes on the surface short-circuit electric 23 890 V. Plessky & J. Koskela Table 2. 5, / J / A O = 0 - 1 % substrate v0 [m/s] ST-quartz X-112°Y-LiTa03 3158 3301 (*). 43 Materials parameters for quartz and LiTa03 from Refs. 50,51. fields, decreasing the energy flow in the wave and consequently, velocity. The term is roughly proportional to the piezoelectric coupling coefficient. The second and third terms describe the linear shift due to the mechanical loading and the so-called energy storage effect, 44 ' 48 respectively.

50,51. fields, decreasing the energy flow in the wave and consequently, velocity. The term is roughly proportional to the piezoelectric coupling coefficient. The second and third terms describe the linear shift due to the mechanical loading and the so-called energy storage effect, 44 ' 48 respectively. The energy storage effect is present also in periodic arrays of grooves, where the mass loading is absent and the first order effect is negligible. For aluminum electrodes in quartz, LiNbC>3 and LiTaC>3 both terms are usually negative.

Unfortunately, if the model (119) is directly used to determine the transduction coefficient a in the STW model of Abbott and Hashimoto, difficulties appear above the frequency A B - The discrepancy arises from the generation of bulk waves, included in Eq. (119) but ignored in STW-COM. An accurate description for the excitation of shear horizontal waves within COM theory remains as an unsolved problem. 3. Accuracy of theoretical simulations Rigorous theoretical methods have their pros and cons.

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Advances in surface acoustic wave technology, systems and applications. Vol. 2 by Clemens C. W. Ruppel


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