Interdigital Transducer Interaction with SAWS and BAWS

摘要: The aim of this work is a rigorous approach to the two-dimensional analysis excitation, propaga- tion and detection acoustic waves. For efficient computation dynamic charge distribution on IDTs we use concept Green's function method moments. Since no restrictions are imposed transducer potentials, even multistrip couplers, multi- phase transducers metal reflectors can be analysed. First apply formalism in sagittal plane in- vestigate BAW excitation. We detail effect BAW- excitation IDT end-fingers present radiation pat- terns YZ-LiNbOs. Next extend treat SAW diffraction surface rigorously. take into account anisotropy both slowness coupling-coefficient, I. Introduction calculation interaction interdigital (IDTs) with waves piezoelectric materials ba- sically problem solving coupled electric field equations. distributions requires solution boundary value for set linear partial differential equations (l). Treating problems, primary task construct associated function. latter response medium due point Applying superposition principle, any electrical mechanical quantity $(F) written as convolution G(F - F') spatial ex- citing physical u(Ff): = Ff)u(Ff)dFf