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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Coupled-mode analysis of Love waves in a filter film withperiodically corrugated surfaces
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Coupled-mode analysis of Love waves in a filter film withperiodically corrugated surfaces

机译：具有周期性波纹表面的滤膜中爱波的耦合模式分析

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摘要

Mode coupling of Love waves in an orthotropic thin film havingnperiodically corrugated surfaces over an isotropic elastic half space isnconsidered. Six modes are coupled by both surfaces by means of threensimultaneous resonant conditions. On the basis of the weakness of thencorrugations, the method of multiple scales is used to derive thencoupled-mode equations. These equations together with relevant boundarynconditions form a two-point boundary-value problem, which is solvednnumerically. The filter frequency response of a corrugated film designednas a stop-band filter is calculated. Enhanced filter characteristics arenachieved when tapered corrugations are imposed. A narrow pass-bandnfilter is also designed. Its high quality factor presents thenfascinating features that might be realized by including the periodicncorrugations in the design of SAW devices
机译：考虑了在各向同性弹性半空间上具有非周期性波纹表面的正交各向异性薄膜中的Love波波的模耦合。六个模式通过三个同时共振条件在两个表面上耦合。基于波纹的弱点，采用多尺度法导出耦合模方程。这些方程与相关的边界条件一起形成了一个两点边值问题，可以通过数值求解。计算了波纹膜设计的阻带滤波器的频率响应。当施加锥形波纹时，可获得增强的过滤器特性。还设计了窄带通滤波器。它的高品质因数呈现出令人着迷的特征，可以通过在SAW设备的设计中包括周期性波纹来实现

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