The scattering analysis of elastic wave propagation control based on fractional Fourier transform

Due to the approximate design method itself, and the impedance matching material parameters, and requirements of dielectric materials to be kept intact, etc, the scattering effect is produced when the elastic wave spreads in the design of material with the transformation method. The result of design focuser homogeneous elastic wave approximation as the research object, fractional Fourier transform (FRFT) is presented to analyze the scattering effect, which is sensitive to the frequency change. This analysis intuitively, quantitatively reflects the frequency variation caused by scattering effect, reduces the cognitive blindness of the degree of scattering, and provides the grounds for a simplified design of material parameters.