A new generalized modeling of SAW transducers and gratings
A new generalized modeling of SAW transducers and gratings
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DOI：
10.1109/freq.1989.68920
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发表时间：
1989-05
期刊：
影响因子：
--
通讯作者：
P. Wright
中科院分区：
文献类型：
--
作者：
P. Wright
对SAW换能器和光栅的模式耦合进行了一般分析。该分析适用于SAW器件的完整连续体，从有或没有内部反射的换能器到由凹槽或金属条纹组成的光栅反射器。该分析包含了以前在这类分析中没有包括的几个重要现象。同时考虑了有限电极电阻率和空间变化传播损耗的影响。此外，该分析具有足够的通用性，可以在相对任意的晶体取向上对复杂器件进行建模。得到了器件内正向和反向传播声波振幅与母线上电流的三个耦合一阶微分方程。这些方程直接引出了SAW器件一些非常基本特性的简单表达式
A general coupling-of-modes analysis of SAW transducers and gratings is presented. The analysis is applicable to the complete continuum of SAW devices, from transducers with or without internal reflections to grating reflectors comprised of grooves or metallic stripes. The analysis incorporates several important phenomena not previously included in analyses of this type. Both the effects of finite-electrode resistivity and spatially varying propagation loss are accounted for. In addition, the analysis is sufficiently general to permit the modeling of complex devices on relatively arbitrary crystal orientations. Three coupled first-order differential equations are obtained relating the forward and reverse propagating acoustic-wave amplitudes i the device and the current on the busbars. These equations lead directly to simple expressions for some very fundamental characteristics of SAW devices.>