SURFACE TRANSVERSE-WAVES UNDER METAL STRI P OR GROOVE GRATINGS ON PIEZOELECTRIC SUBSTRATES

This study is devoted to the theoretical calculation of the propagatio n characteristics of shear horizontal waves trapped in surface transve rse wave (STW) resonators. The model implemented takes piezoelectricit y into account and provides the principal parameters of the acoustic w ave (propagation and attenuation coefficients, velocity, etc.) propaga ting under shallow groove or thin metal strip gratings. A numerical me thod has been used to resolve the equations of the problem. The result s obtained are in good agreement with previous results without piezoel ectricity. Calculation results are presented for delay lines designed with metal strip gratings deposited on AT-cut of quartz.