Characteristics of longitudinal leaky surface wave propagating on La3Ga5SiO14 substrate

The propagation characteristics of the longitudinal leaky surface wave prop agating on a La3Ga5SiO14 retically investigated for all cuts and propagatio n directions. The results of temperature coefficient of delay (TCD), electr omechanical coupling constant (K-2) and phase velocity were displayed on co ntour maps. Cuts with zero TCD were obtained at Euler's angle's of (20 degr ees, theta, psi) and (30 degrees, theta, psi). Temperature dependence of fr actional time delay (Delta tau/tau) on (90 degrees, 90 degrees, 0 degrees)- cut changes only by 18.5 ppm from -30 degreesC to 110 degreesC. This cut ha s very good temperature characteristics.