An analysis is presented of the scattering of surface acoustic waves (SAW) by posts serving as spacers between a substrate supporting a Rayleigh wave and a (semiconductor) superstrate. The superstrate with Rayleigh velocity considerably larger than that of the substrate is modelled as a spring-like load on the post. Radiation patterns for the power scattered into Rayleigh waves and bulk waves are shown. Scattering of surface acoustic waves is studied as a function of the material parameters and the geometry of the post-supports. Comparison with experiments is made. This study is relevant to the designing of efficient convolvers which minimize the scattering due to the post-support structure.
All Science Journal Classification (ASJC) codes
- 工程 (全部)