Title :
Analytic model for STW/BGW/LSAW resonators
Author :
Koskela, Julius ; Plessky, Victor P. ; Salomaa, Martti M.
Author_Institution :
Mater. Phys. Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
The propagation and excitation of surface transverse waves (STWs), interacting with bulk-acoustic waves (BAWs), are considered. A parametrized model is proposed for the harmonic admittance of STWs in an infinite periodic grating. The model enables the study of various phenomena, such as unidirectionality, parasitic BAW radiation, and the frequency-dependence of the electromechanical coupling. The analytic formula allows ideal one-port synchronous resonators to be modeled numerically. Results are compared with simulations and experiments
Keywords :
surface acoustic wave resonators; Bleustein-Gulyaev wave; STW/BGW/LSAW resonator; analytical model; bulk acoustic wave; electromechanical coupling; frequency dependence; harmonic admittance; leaky surface acoustic wave; parasitic radiation; periodic grating; surface transverse wave; synchronous resonator; unidirectionality; Admittance; Dispersion; Electrodes; Frequency; Gratings; Physics; Surface acoustic wave devices; Surface acoustic waves; Transducers; Voltage;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762117
