TY - JFULL AU - D. G. Piliposyan PY - 2017/2/ TI - Defect Modes in Multilayered Piezoelectric Structures T2 - International Journal of Mechanical and Mechatronics Engineering SP - 105 EP - 114 VL - 11 SN - 1307-6892 UR - https://publications.waset.org/pdf/10006224 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 121, 2017 N2 - Propagation of electro-elastic waves in a piezoelectric waveguide with finite stacks and a defect layer is studied using a modified transfer matrix method. The dispersion equation for a periodic structure consisting of unit cells made up from two piezoelectric materials with metallized interfaces is obtained. An analytical expression, for the transmission coefficient for a waveguide with finite stacks and a defect layer, that is found can be used to accurately detect and control the position of the passband within a stopband. The result can be instrumental in constructing a tunable waveguide made of layers of different or identical piezoelectric crystals and separated by metallized interfaces. ER -