Anisotropic diffraction in acoustic delay lines with mosaic transducers

Based on the Green´s function, we built the method for calculating the diffraction fields of mosaic piezo-electric transducers in anisotropic crystalline sound conductor. We gave the results of numerical research of diffraction fields generated by mosaic piezoelectric transducer on the end surface of the sound conductor and the calculation of the diffraction losses of the main signal, triple and five-time signal passage in acoustic delay line microwave signal operating mode “on the passage”. We investigated the dependence of the diffraction losses on the angle between the crystallographic and the geometrical axes of the sound conductor and diffraction losses at different values of the displacement input and output transducers relative to each other´s to determine the allowable for manufacturing value of the displacement transducers. Based on these investigations we suggested a method for suppression of multipass signals by using the diffraction properties of the transducers.