Jeoti V, Jhunjhunwala A
Dept. of Electr. Eng., Indian Inst. of Technol., Madras.
IEEE Trans Ultrason Ferroelectr Freq Control. 1992;39(1):127-37. doi: 10.1109/58.166820.
The problem of scattering of Rayleigh waves at a rectangular groove is addressed. Grooves are known to excite bulk waves upon scattering and, hence, are potential sources (albeit secondary) in bulk-acoustic-wave (BAW) devices. The groove is formulated as a volume perturbation of the geometry. A modal method is used, and the results of Rayleigh wave reflection as well as bulk wave radiation are obtained and compared with the results available in the literature. The method is compared with the boundary perturbation formulation. The equivalence of the boundary perturbation method and the volume perturbation method is shown.
研究了矩形凹槽处瑞利波的散射问题。众所周知，凹槽在散射时会激发体波，因此是体声波（BAW）器件中的潜在源（尽管是次级源）。将凹槽表述为几何形状的体积微扰。采用模态方法，获得了瑞利波反射以及体波辐射的结果，并与文献中的现有结果进行了比较。将该方法与边界微扰公式进行了比较。证明了边界微扰方法与体积微扰方法的等效性。
