Abstract
The paper deals with the derivation of simple polynomials characterising SAW reflection by metallic gratings with various widths and thicknesses. Such polynomial approximation makes it possible to estimate COM parameters in markedly reduced computational time. For very sophisticated SAW devices, this is of great use to develop high-speed simulation and design tools based on COM method. In the present study, it is shown how simply and accurately the SAW reflection by aluminium (Al) gratings on 128/spl deg/YX-LiNbO/sub 3/ substrates is characterised by polynomial approximation.
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